CN109820214A - A kind of the oscillatory type vacuum impulse dryer device and its drying means of granule materials - Google Patents
A kind of the oscillatory type vacuum impulse dryer device and its drying means of granule materials Download PDFInfo
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- CN109820214A CN109820214A CN201910062669.6A CN201910062669A CN109820214A CN 109820214 A CN109820214 A CN 109820214A CN 201910062669 A CN201910062669 A CN 201910062669A CN 109820214 A CN109820214 A CN 109820214A
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Abstract
The present invention relates to the oscillatory type vacuum impulse dryer devices and drying means of a kind of granule materials, the device includes vacuum system, vibrational system, heating system and control system, it can effectively realize that temperature, the intelligence of vacuum degree adjust and expect the intermittent vibration of frame, improve the rate of drying and uniform drying of granule material.The drying means is under the dry continuous pulsating condition of room pressure, the granule materials such as lichee are dried using vacuum impulse mode, the pulp interior microscopic duct of the granule materials such as lichee can be made constantly to expand, shrink, and then it interconnects, effectively facilitate drying, so that granule materials center of gravity is shifted and is bonded with heating plate under the effect of vibration of material frame simultaneously, is internally transmitted conducive to the heat by carpopodium.
Description
Technical field
The invention belongs to agricultural product technology manufacture fields, are related to the oscillatory type vacuum drying device and method of granule materials,
More particularly to a kind of oscillatory type vacuum drying device and method of lichee.
Background technique
Lichee (scientific name: Litchi chinensisSonn.) is also often dried to the products such as dried litchi in addition to by fresh food,
Abundant product machining kinds, extend its shelf life.Lichee is dried frequently with hot wind or high temperature sunning, the product water after drying
Divide removing, pulp sugar content improves；Again because heated-air drying processing technology is convenient, it is dry after product mouthfeel be suitable for thus the market demand
It measures larger.Not only nutritional ingredient is maintained lichee finished product after drying, but also storage period extends, and is readily transported and stores.
For the prior art, heated-air drying is current main drying mode, but is caused because contacting in the process with oxygen
Pulp is easy to that brown stain occurs.In order to improve it is dry after litchi pulp color and frequently with sulphuring processing, i.e., with burning sulphur
It smokes or is configured to certain density aqueous solution with sulfurous acid and its esters to impregnate lichee to be dried.But medical research is
It proves, human body eats the fruits and vegetables that sulfur fumigation is crossed and food can destroy alimentary canal and respiratory system mucous membrane is impaired；In addition can also
There is damage to liver, kidney and other organs；The sulphur more seriously used for cost consideration is second-rate, and purity is not high, leads
Stifling fruits and vegetables are caused to contain the heavy metals such as more lead, mercury, if amount is larger or long-term consumption can also cause slow poisoning.
Therefore country, which has sulfur content in fruits and vegetables, clearly limits, and part fruits and vegetables have prohibited sulphuring processing.
In the prior art, another common drying mode is vacuum drying also known as parsing-desiccation, and material is placed in very
Under empty condition of negative pressure, reduce the boiling point of water, due to drying process and extraneous oxygen-barrier, conducive to the holding of nutritional ingredient.Cause
This, vacuum drying technique is widely used in the production of fruit-vegetable food, and especially the extract of natural products is dry, because natural
Many functional component non-refractories in product and vacuum drying is widely used.But conventional vacuum dry technology often uses one
The steam partial pressure of a vacuum degree or the mode of " vacuum pressure maintaining ", the heated rear surface of material is easy the vapor in dry environment
Partial pressure balance, causes moist gradient to decline, reduces the dehydration efficiency of material.
Vacuum impulse dry technology develops on conventional vacuum dry technology, refers to dry room pressure according to certain
The dry technology of regular periodically pulsing variation.Due to switching using continuous periodic pressure, constantly break moisture evaporation
Equilibrium state, it is dry compared to conventional vacuum from accelerating drying process, have that drying efficiency is high, quality is preferably etc. many excellent
Gesture.
Common Minton dryer, charging tray directly and contact heater plate, transfer heat to material by heat transfer.Litchi
Branch belongs to the berries material with shell class, and pulp is close to shell, pulp and fruit stone and is connected by carpopodium with shell, fresh lichee
Center of gravity is in its center.In hot-air drying process, heat is transmitted to shell in a manner of thermal convection, and then is transmitted to inner aqueous rate
Higher pulp.With scattering and disappearing for pulp moisture, pulp is gradually tapered up, and center of gravity can be gradually to offset, pulp and shell at carpopodium
Between can also have gap, be unfavorable for heat and inwardly transmit.But the pulp shunk still passes through carpopodium and cage connection, if adopted
With the heating method of electric boiling plate, the heated material by way of heat transfer will be close at carpopodium if fruit frame slightly vibrates
Heating plate, heat is directly delivered to internal pulp by carpopodium, to improve heat transfer efficiency, accelerates rate of drying.
For the dry processing of lichee, current research is concentrated mainly on the extraction of lichee effective component and field of deep,
Such as: patent publication No. is the patent of invention of CN102860476A, discloses a kind of instant litchi chinensis powder and preparation method；Patent disclosure
Number patent of invention for being CN107459588A, discloses the side that a kind of supercritical carbon dioxide extraction technology extracts lichee grass polysaccharide
Method；Patent publication No. is the patent of invention of CN103636769A, discloses a kind of low-temperature vacuum drying roasting dried litchi, dried longan
Method.But still lack the drying device and method specifically for the particulate species berry material such as lichee.Therefore, with lichee
For the berries material of Typical Representative, a kind of drying device and method suitably, securely and reliably is needed.
Summary of the invention
In view of the above problems, the purpose of the present invention is to provide it is a kind of it is high-efficient, easy to use, be conducive to quickly, it is effectively dry
The oscillatory type vacuum impulse dryer apparatus and method of the berries granule materials such as dry lichee.
In order to achieve the above object, the present invention provides the following technical scheme that the present invention provides a kind of granule materials
Oscillatory type vacuum impulse dryer device, including vacuum system, vibrational system, heating system and control system, the vacuum system
Including hothouse 2, trap 7, vacuum pump 8 and condensation water tower 9, described 2 one end of hothouse is connected to the trap 7, described true
8 one end of sky pump are connected to the trap 7, and the other end connects the condensation water tower 9；The vibrational system includes material frame 3, cam
4, fan 12, support base 13, admission line 16 and vibrating shaft 24 are vibrated, is connected with 4 He of cam on the vibrating shaft 24
Fan 12 is vibrated, the support base 13 supports the vibrating shaft 24 by the cam 4, in the drive of the vibration fan 12
Under, the rotation of vibrating shaft 24 is to drive the cam 4 to slide in the support base 13；The heating system includes adding
Hot plate 14 and charging tray 15；The control system includes pressure sensor 10 and master control unit, the pressure sensor 10 with it is described
Hothouse 2 is connected, and the master control unit and intake valve 17, vacuum solenoid 6, vacuum pump 8 etc. are electrically connected.
Further, the vacuum control valve 6 is arranged on the pipeline between the hothouse 2 and trap 7.
Preferably, the vacuum pump 8 is water-ring vacuum pump.
Preferably, the water temperature in the condensation water tower 9 is 15~40 DEG C.
Preferably, layered distribution is arranged as multiple the heating plate 14 along the vertical direction, and the spacing of two heating plates 14 is 30
~70mm；
Preferably, the charging tray 15 is located in the heating plate 14, single layer tiling lichee 18 on the charging tray 15.
The present invention also provides a kind of drying means of oscillatory type vacuum impulse dryer device, include the following steps:
A) it is put into charging tray 15 after cleaning the lichee 18 for removing cauline leaf impurity, is packed into hothouse 2；
B) be set separately the absolute vacuum degree range of hothouse 2, the temperature of heating plate 14, pulsation than and it is continuous drying when
Between；
Wherein, the absolute vacuum degree range of hothouse 2 is 0~6kPa, and the temperature of heating plate 17 is 40 DEG C~80 DEG C, pulsation
Than the ratio for hothouse 2 normal pressure state time and vacuum state time, the ratio is 1/2~1/5, and the continuous drying time is
12~20 hours, normal pressure state are local real atmosphere pressure；
C) according to setting time, vacuum impulse drying and heating are carried out to lichee 18；
In the vacuum state of drying process, master control unit controls intake valve according to the pressure value that pressure sensor 10 provides
17, which close and control vacuum solenoid 6, opens, and starts vacuum pump 8 and start to vacuumize, and the air in hothouse 2 is through vacuum electromagnetic
Valve 6, trap 7 are extracted by vacuum pump 8, when the vacuum degree in hothouse 2 reaches in setting vacuum ranges, stop taking out true
Sky, and maintain the vacuum degree of setting；
In the normal pressure state of drying process, master control unit controls vacuum electric according to the pressure value that pressure sensor 10 provides
Magnet valve 6 and vacuum pump 8 are closed, while controlling the unlatching of intake valve 17, under the action of 2 internal and external pressure difference of hothouse, outside air
Hothouse 2 is entered by admission line 16, and impact vibration fan 12 is to drive vibrating shaft 24 and cam 4 to rotate, cam 4 with
Under the interaction of support base 13, and then material frame 3 is driven to vibrate up and down；
Vacuum state time and normal pressure state time ratio of the master control unit according to the pulsation of setting than controlling drying process；
During heating, master control unit regulates and controls heating plate 14 according to the drying temperature of setting and starting and stopping, when adding
14 temperature of hot plate starts starting heating lower than the temperature range of setting；When 14 temperature of heating plate is higher than in the temperature range of setting,
Then stop heating；
D) terminate heating, close master control unit, open hothouse 2, take out lichee 18.
Preferably, in the step b), the absolute vacuum degree range of hothouse 2 is 0~6kPa, the temperature 70 of heating plate 14
DEG C, pulsation is than the ratio for hothouse 2 normal pressure state time and vacuum state time, ratio 4/15, continuous drying time
18 hours.
Preferably, in the step b), the absolute vacuum degree range of hothouse 2 is 0~6kPa, the temperature 60 of heating plate 14
DEG C, pulsation is than the ratio for hothouse 2 normal pressure state time and vacuum state time, ratio 8/15, continuous drying time
22 hours.
Preferably, in 18 heating process of lichee, the vapor of evaporation is condensed in the trap 7.
Compared with prior art, the beneficial effects of the present invention are:
1) present invention is dried the granule materials such as lichee using vacuum drying mode, avoids drying process and oxygen
Gas excessive contact, the phenomenon that effectively having contained fruit browning；
2) present invention can make the microcosmic duct of dried material regularly under the dry continuous pulsating condition of room pressure
Continuous expansion and contraction, and then interconnect, the moisture transmitting of dried material in the drying process can be effectively facilitated, is maintained higher
Rate of drying；
3) the characteristics of pulp contraction of the invention for taking into account the granule materials such as lichee in drying process and its center of gravity shift,
Make pulp under the effect of gravity with contact heater plate by vibration, heat is quickly transmitted to interior flesh by carpopodium, to mention
High drying efficiency；
4) present invention can effectively realize that temperature, the intelligence of vacuum degree are adjusted, and make the intermittent vibration of dried material, dry speed
Fast, uniform drying is spent, the flesh color of the granule materials such as lichee after drying is beautiful, and nutriment loss is few.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the oscillatory type vacuum impulse dryer device of granule materials of the invention；
Fig. 2 is a kind of detailed construction of the vibrational system of the oscillatory type vacuum impulse dryer device of granule materials of the invention
Schematic diagram；
During Fig. 3 is dried for the oscillatory type vacuum impulse dryer device using a kind of granule materials of the invention,
Gravity center shift process schematic；
Appended drawing reference are as follows:
1- control cabinet, 2- hothouse, 3- expect frame, 4- cam, 5- bearing, 6- vacuum solenoid, 7- trap, 8- vacuum
Pump, 9- condense water tower, 10- pressure sensor, 11- support spring, 12- vibration fan, 13- support base, 14- heating plate, 15-
Charging tray, 16- admission line, 17- intake valve, 18- lichee, 19 touch screens, 20- carpopodium, 21- center of gravity, 22- pulp, 23- shell,
24- vibrating shaft.
Specific embodiment
With reference to the accompanying drawings and examples, a specific embodiment of the invention is further described.
A kind of oscillatory type vacuum impulse dryer device of the invention, the dry processing for the berries material such as lichee.
As shown in Figure 1, a kind of oscillatory type vacuum impulse dryer device of the present invention, including vacuum system, vibrational system, heating
System and control system.Wherein,
The vacuum system includes hothouse 2, trap 7, vacuum pump 8 and condensation water tower 9；
Described 2 one end of hothouse is connected to the trap 7 by pipeline, the pipeline between the hothouse 2 and trap 7
On be additionally provided with vacuum control valve 6；
The trap 7 is used to condense and collect the vapor of evaporation；
Described 8 one end of vacuum pump is connected to the trap 7 by pipeline, and the other end connects the condensation water tower 9；
Preferably, the vacuum pump 8 is water-ring vacuum pump；
Preferably, the water temperature in the condensation water tower 9 is 15~40 DEG C.
As shown in Fig. 2, the vibrational system includes material frame 3, cam 4, bearing 5, support spring 11, vibration fan 12, branch
Support pedestal 13, admission line 16 and vibrating shaft 24；
The support spring 11 is symmetrically positioned at the bottom position of the side of the material frame 3；
The middle position that the bearing 5 is located at the other side of the material frame 3 is connected with the vibrating shaft 24 thereon；
Cam 4 and vibration fan 12 are successively connected on the vibrating shaft 24；
Vibrating shaft 24 is supported by the cam 4 in the support base 13, and then the material frame 3 can be supported；
Under the drive of the vibration fan 12, the vibrating shaft 24 can be rotated along the bearing 5, thus described in driving
Cam 4 slides in the support base 13, due to the cam 4 be ellipse and major and minor axis is different, the material frame 3 exists
Under the rotation of the vibration fan, can constantly it vibrate.
As shown in Figure 1, the heating system includes heating plate 14 and charging tray 15；
The heating plate 14 along the vertical direction layered distribution be arranged as it is multiple,
Preferably, 30~70mm of spacing of two heating plates 14；
The charging tray 15 is located in the heating plate 14, single layer tiling lichee 18 on the charging tray 15.
As shown in Figure 1, the control system includes control cabinet 1, touch screen 19, pressure sensor 10 and master control unit；
The pressure sensor 10 is connected with the hothouse 2；
The master control unit be single-chip microcontroller input/output module, respectively with intake valve 17, vacuum solenoid 6, vacuum pump 8 with
And touch screen 19 is electrically connected；
Preferably, power switch is additionally provided on the master control unit；
Preferably, the master control unit is also electrically connected with the heating plate 14.
Fig. 3 is the gravity center shift schematic diagram of lichee 18 in oscillatory type vacuum palsating equipment drying process of the invention:
When starting dry, pulp 22 is close to shell 23, and pulp 22 is connected by carpopodium 20 with shell 23, the weight of fresh lichee
The heart 21 is in its center；
It is carried out with dry, 22 moisture of pulp gradually scatters and disappears, and pulp 22 can gradually taper up, and center of gravity 21 can be gradually at carpopodium
Offset, at this point, inwardly transmitted between pulp 22 and shell 23 due to being unfavorable for heat there are gap, but the pulp 22 shunk according to
So connected by carpopodium 20 and shell 23；
Heating plate 14 is slightly vibrated, and under the action of deviating center of gravity 21, carpopodium 20 will be close to heating plate 14, and heat passes through
Carpopodium 20 is directly delivered to internal pulp 22, to improve heat transfer efficiency, accelerates rate of drying.A kind of vibration of the invention
The drying means of the dry lichee device of dynamic formula vacuum impulse, includes the following steps:
A) it is put into charging tray 15 after cleaning the lichee 18 for removing cauline leaf impurity, is packed into hothouse 2；
B) starter, be set separately the absolute vacuum degree range of hothouse 2, the temperature of heating plate 14, pulsation ratio and
The continuous drying time；
Preferably, the absolute vacuum degree range of hothouse 2 is 0~6kPa, and the temperature of heating plate 17 is 40 DEG C~80 DEG C, arteries and veins
The dynamic ratio than being hothouse 2 normal pressure state time and vacuum state time, the ratio are 1/2~1/5, the continuous drying time
For 12~20 hours, normal pressure state is local real atmosphere pressure；
C) according to setting time, vacuum impulse drying and heating are carried out to lichee 18；
In the vacuum state of drying process, master control unit controls intake valve according to the pressure value that pressure sensor 10 provides
17, which close and control vacuum solenoid 6, opens, and starts vacuum pump 8 and start to vacuumize, and the air in hothouse 2 is through vacuum electromagnetic
Valve 6, trap 7 are extracted by vacuum pump 8, when the vacuum degree in hothouse 2 reaches in setting vacuum ranges, stop taking out true
Sky, and maintain the vacuum degree of setting；
In the normal pressure state of drying process, master control unit controls vacuum electric according to the pressure value that pressure sensor 10 provides
Magnet valve 6 and vacuum pump 8 are closed, while controlling the unlatching of intake valve 17, under the action of 2 internal and external pressure difference of hothouse, outside air
Hothouse 2 is entered by admission line 16, and impact vibration fan 12 is to drive vibrating shaft 24 and cam 4 to rotate, cam 4 with
Under the interaction of support base 13, and then material frame 3 is driven to vibrate up and down；
Vacuum state time and normal pressure state time ratio of the master control unit according to the pulsation of setting than controlling drying process；
During heating, master control unit regulates and controls heating plate 14 according to the drying temperature of setting and starting and stopping, when adding
14 temperature of hot plate starts starting heating lower than the temperature range of setting；When 14 temperature of heating plate is higher than in the temperature range of setting,
Then stop heating；
Preferably, in 18 heating process of lichee, the vapor of evaporation is condensed in trap 7.
D) terminate heating, close master control unit, open hothouse 2, take out lichee 18.
Preferred embodiment below is set forth below, the method for oscillatory type vacuum impulse dryer lichee of the invention is carried out into one
Step ground detailed description.Preferred embodiment 1
A) it is put into charging tray 15 after cleaning the lichee 18 for removing cauline leaf impurity, is packed into hothouse 2；
B) starter, be set separately the absolute vacuum degree range of hothouse 2,14 temperature of heating plate, pulsation than with
And the continuous drying time；
Wherein, the absolute vacuum degree range of hothouse 2 is 0~6kPa, and the temperature 70 C of heating plate 14, pulsation is than being drying
The ratio of room 2 normal pressure state time and vacuum state time, ratio 4/15, continuous drying time are 18 hours, normal pressure shape
State is local real atmosphere pressure；
C) according to setting time, oscillatory type vacuum impulse dryer and heating are carried out to lichee 18；
In the vacuum state of drying process, master control unit controls intake valve according to the pressure value that pressure sensor 10 provides
17, which close and control vacuum solenoid 6, opens, and starts vacuum pump 8 and start to vacuumize, and the air in hothouse 2 is through vacuum electromagnetic
Valve 6, trap 7 are extracted by vacuum pump 8, when the vacuum degree in hothouse 2 reaches in setting vacuum ranges, stop taking out true
Sky maintains the vacuum degree of setting；
In the normal pressure state of drying process, master control unit controls vacuum electric according to the pressure value that pressure sensor 10 provides
Magnet valve 6 and vacuum pump 8 are closed, while controlling the unlatching of intake valve 17, under the action of 2 external and internal pressure of hothouse, outside air by
Admission line 16 enters hothouse 2, and impact vibration fan 12 in cam 4 and props up to drive vibrating shaft 24 and cam 4 to rotate
Under the interaction for supportting pedestal 13, and then material frame 3 is driven to vibrate up and down；
Vacuum state time and normal pressure state time ratio of the master control unit according to the pulsation of setting than controlling drying process；
During heating, master control unit regulates and controls heating plate 14 according to the drying temperature of setting and starting and stopping, when adding
14 temperature of hot plate starts starting heating lower than the temperature range of setting；When 14 temperature of heating plate is higher than in the temperature range of setting,
Then stop heating；
Wherein, in lichee processing heating process, the vapor of evaporation condenses in trap 7.
D) terminate heating, close master control unit, open hothouse 2, take out lichee 18.(the setting heating temperature of preferred embodiment 2
Degree, pulsation are than different, remaining is with example 1)
A) it is put into charging tray 15 after cleaning the lichee 18 for removing cauline leaf impurity, is packed into hothouse 2；
B) start oscillatory type vacuum impulse dryer device, set the absolute vacuum degree range of hothouse 1, heating plate 14
Temperature, pulsation than and the continuous drying time；
Wherein, the absolute vacuum degree range of hothouse 2 is 0~6kPa, and the temperature 60 C of heating plate 14, pulsation is than being drying
The ratio of room 2 normal pressure state time and vacuum state time, ratio 8/15, continuous drying time are 22 hours, normal pressure shape
State is local real atmosphere pressure；
C) according to setting time, oscillatory type vacuum impulse dryer and heating are carried out to lichee 18；
In the vacuum state of drying process, master control unit controls intake valve according to the pressure value that pressure sensor 10 provides
17, which close and control vacuum solenoid 6, opens, and starts vacuum pump 8 and start to vacuumize, and the air in hothouse 2 is through vacuum electromagnetic
Valve 6, trap 7 are extracted by vacuum pump 8, when the vacuum degree in hothouse 2 reaches in setting vacuum ranges, stop taking out true
Sky maintains the vacuum degree of setting；
In the normal pressure state of drying process, master control unit controls vacuum electric according to the pressure value that pressure sensor 10 provides
Magnet valve 6 and vacuum pump 8 are closed, while controlling the unlatching of intake valve 17, under the action of 2 external and internal pressure of hothouse, outside air by
Admission line 16 enters hothouse 2, and impact vibration fan 12 in cam 4 and props up to drive vibrating shaft 24 and cam 4 to rotate
Under the interaction for supportting pedestal 13, and then material frame 3 is driven to vibrate up and down；
Vacuum state time and normal pressure state time ratio of the master control unit according to the pulsation of setting than controlling drying process；
During heating, master control unit regulates and controls heating plate 14 according to the drying temperature of setting and starting and stopping, when adding
14 temperature of hot plate starts starting heating lower than the temperature range of setting；When 14 temperature of heating plate is higher than in the temperature range of setting,
Then stop heating；
Wherein, in lichee processing heating process, the vapor of evaporation condenses in trap 7.
D) terminate heating, close master control unit, open hothouse 2, take out lichee 18.
It will be understood by those skilled in the art that: it without departing from the principle and spirit of the present invention can be right
These embodiments carry out a variety of change, modification, replacement and modification, and the scope of the present invention is defined by the claims and their equivalents.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Claims (10)
1. a kind of oscillatory type vacuum impulse dryer device of granule materials, including vacuum system, vibrational system, heating system and control
System processed, which is characterized in that
The vacuum system includes hothouse (2), trap (7), vacuum pump (8) and condenses water tower (9),
Described hothouse (2) one end is connected to the trap (7),
Described vacuum pump (8) one end is connected to the trap (7), and the other end connects the condensation water tower (9)；
The vibrational system include material frame (3), cam (4), vibration fan (12), support base (13), admission line (16) and
Vibrating shaft (24),
The cam (4) and vibration fan (12) are connected on the vibrating shaft (24),
The support base (13) supports the vibrating shaft (24) by the cam (4),
Under the drive of vibration fan (12), vibrating shaft (24) rotation is to drive the cam (4) in the branch
It is slided in support pedestal (13)；
The heating system includes heating plate (14) and charging tray (15)；
The control system includes pressure sensor (10) and master control unit,
The pressure sensor (10) is connected with the hothouse (2),
The master control unit is electrically connected with intake valve (17), vacuum solenoid (6) and vacuum pump (8).
2. oscillatory type vacuum impulse dryer device according to claim 1, which is characterized in that
On the pipeline that the vacuum control valve (6) is arranged between the hothouse (2) and trap (7).
3. oscillatory type vacuum impulse dryer device according to claim 1, which is characterized in that the vacuum pump (8) is water
Ring vacuum pumps.
4. oscillatory type vacuum impulse dryer device according to claim 1, which is characterized in that in the condensation water tower (9)
Water temperature be 15~40 DEG C.
5. oscillatory type vacuum impulse dryer device according to claim 1, which is characterized in that the heating plate (14) is along perpendicular
Histogram is arranged as multiple to layered distribution, and the spacing of two heating plates (14) is 30~70mm.
6. oscillatory type vacuum impulse dryer device according to claim 5, which is characterized in that the charging tray (15) is located at institute
It states on heating plate (14), single layer tiling lichee (18) on the charging tray (15).
7. the drying means of the oscillatory type vacuum impulse dryer device of any one of -6 claims according to claim 1, feature
It is, includes the following steps:
A) it will be put into charging tray (15), be packed into hothouse (2) after lichee (18) cleaning for removing cauline leaf impurity；
B) be set separately the absolute vacuum degree range of hothouse (2), the temperature of heating plate (14), pulsation than and it is continuous drying when
Between；
Wherein, the absolute vacuum degree range of hothouse (2) is 0~6kPa, and the temperature of heating plate (17) is 40 DEG C~80 DEG C, pulsation
Than the ratio for hothouse (2) the normal pressure state time and vacuum state time, the ratio is 1/2~1/5, the continuous drying time
For 12~20 hours, normal pressure state is local real atmosphere pressure；
C) according to setting time, vacuum impulse drying and heating are carried out to lichee (18)；
In the vacuum state of drying process, master control unit controls intake valve according to the pressure value that pressure sensor (10) provides
(17) it closes and controls vacuum solenoid (6) to open, and start vacuum pump (8) and start to vacuumize, the air warp in hothouse (2)
Vacuum solenoid (6), trap (7) are extracted by vacuum pump (8), when the vacuum degree in hothouse (2) reaches setting vacuum degree
When in range, stop vacuumizing, and maintains the vacuum degree of setting；
In the normal pressure state of drying process, master control unit controls vacuum electromagnetic according to the pressure value that pressure sensor (10) provides
Valve (6) and vacuum pump (8) are closed, while controlling intake valve (17) unlatching, under the action of hothouse (2) internal and external pressure difference, outside
Boundary's air enters hothouse (2) by admission line (16), and impact vibration fan (12) is to drive vibrating shaft (24) and cam
(4) it rotates, under the interaction of cam (4) and support base (13), and then material frame (3) is driven to vibrate up and down；
Vacuum state time and normal pressure state time ratio of the master control unit according to the pulsation of setting than controlling drying process；
During heating, master control unit regulates and controls starting and stopping for heating plate (14) according to the drying temperature of setting, works as heating
Plate (14) temperature starts starting heating lower than the temperature range of setting；When heating plate (14) temperature is higher than in the temperature model of setting
It encloses, then stops heating；
D) terminate heating, close master control unit, open hothouse (2), take out lichee (18).
8. drying means according to claim 7, which is characterized in that in the step b), the absolute vacuum degree model of hothouse (2)
It encloses for 0~6kPa, the temperature 70 C of heating plate (14), pulsation is than being hothouse (2) normal pressure state time and vacuum state time
Ratio, ratio 4/15, the continuous drying time be 18 hours.
9. drying means according to claim 8, which is characterized in that in the step b), the absolute vacuum degree model of hothouse (2)
It encloses for 0~6kPa, the temperature 60 C of heating plate (14), pulsation is than being hothouse (2) normal pressure state time and vacuum state time
Ratio, ratio 8/15, the continuous drying time be 22 hours.
10. drying means according to claim 9, which is characterized in that in lichee (18) heating process, the vapor of evaporation exists
It is condensed in the trap (7).
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| CN201910062669.6A CN109820214B (en) | 2019-01-23 | 2019-01-23 | Vibrating type vacuum pulsation drying device and method for particle materials |
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| CN201910062669.6A CN109820214B (en) | 2019-01-23 | 2019-01-23 | Vibrating type vacuum pulsation drying device and method for particle materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111937953A (en) * | 2020-07-19 | 2020-11-17 | 北京工商大学 | Combined drying method of mulberries |
| CN114034174A (en) * | 2021-11-24 | 2022-02-11 | 北京工商大学 | Stirring type vacuum pulsation drying device and drying method |
-
2019
- 2019-01-23 CN CN201910062669.6A patent/CN109820214B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111937953A (en) * | 2020-07-19 | 2020-11-17 | 北京工商大学 | Combined drying method of mulberries |
| CN114034174A (en) * | 2021-11-24 | 2022-02-11 | 北京工商大学 | Stirring type vacuum pulsation drying device and drying method |
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| CN109820214B (en) | 2021-04-13 |
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