CN104896877B - Ultrasonic atomizing and pulse microwave vacuum drying device for liquid material and drying method - Google Patents
Ultrasonic atomizing and pulse microwave vacuum drying device for liquid material and drying method Download PDFInfo
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- CN104896877B CN104896877B CN201510352097.7A CN201510352097A CN104896877B CN 104896877 B CN104896877 B CN 104896877B CN 201510352097 A CN201510352097 A CN 201510352097A CN 104896877 B CN104896877 B CN 104896877B
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Abstract
The invention provides an ultrasonic atomizing and pulse microwave vacuum drying device for a liquid material and a drying method, and belongs to the technical field of microwave vacuum drying of the liquid materials in the chemical, agricultural and food industries. The device is that the liquid material is atomized into fine fogdrop through an ultrasonic atomizer; the fogdrop is heated through an atomizing heater to reach a set temperature and then fed into a vacuum drying tube through a pulse feeding valve, wherein the vacuum drying tube is a channel in which the liquid material fogdrop is dried and flows; optical fiber sensors are mounted at different positions of the vacuum drying tube and used for detecting the drying temperature when the fogdrop falls down; the lower part of the vacuum drying tube is connected with a product collector. According to the device, the liquid material is dried under a microwave vacuum state after atomizing; the method and the device can achieve efficient, energy-saving, uniform and low-temperature drying of the liquid material; therefore, the purpose of improving the quality of dried liquid material products can be achieved.
Description
Technical field
The present invention relates to a kind of for liquid material ultrasonic atomization pulse microwave Minton dryer and be dried
Method, belongs to chemical industry, agricultural, food service industry liquid material microwave vacuum drying technology field.
Background technology
Spray drying is a kind of drying process having been accepted extensively by industrial quarters, is characterized in original state solution, a breast
Turbid liquid, suspension or slurry are contacted with dried medium after the nebulizer atomization of particular design again, complete at short notice
Evaporation drying and obtain dry product.Spray dried products have good mobility, dispersibility and dissolubility.At present, should
Technology is widely used to the industries such as food, pharmacy and chemical industry.According to incompletely statistics, to the end of the year 2006, throwing has been installed in the whole world
, more than 25000 sets, drying capacity is from per hour less than 1kg to 50 ton for the spray drying device producing.
However, traditional spray drying is based on random atomization process, dried medium adopts hot-air or superheated steam.
Therefore, there is the following shortcoming in conventionally spray-dried:
(1) energy consumption of unit product is big, and the thermal efficiency of equipment is low, and only 30% ~ 40%；
(2) volume dry tenacity is less.Volumetric heat transfer coefficient is low, and the bulky, initial investment of exsiccator is expensive；
(3) dried medium consumption is big.In order to maintain the high-speed transfer of heat and quality between drop and dried medium, need
Constantly update the dried medium that interior is dried.So, the dried medium consumption of spray drying is very big；
(4) dry products quality decline.High temperature drying medium brings the loss of product nutrition；
(5) particle size distribution range of product is wide, and quality is uneven.
At present, the energy that drying process is consumed has accounted for more than the 10% of China's total energy consumption.Due to world energy sources increasingly
Anxiety, the environmental consciousness of people and food safety are increasingly strengthened with nutrition consciousness, to high-quality high-efficiency energy-saving spray dry technology
Study on Problems is extremely urgent.
Yang Liansheng, Luo Faxing (1997) disclose " method and its device that the microwave of liquid sugar, vacuum atomizing are dried "
Patent (license application number 97104780).This patent carries out material atomization under vacuum conditions using drive nozzle mode,
There is uneven and wall sticking phenomenon in atomized drop, drop initial temperature before atomization is high simultaneously, brings product thermal sensitivity nutrition to become
The loss of part.Furthermore, in terms of microwave source distribution, using lineal layout, bring microwave field density uneven, microwave power can not connect
Continuous adjustment.In terms of Vacuum System Design, in dryness storehouse, gas is constantly in working condition, easily pumps dried material.In addition,
Nozzle and nebulizer micro-wave screening do not solve.The difference of the present invention is that liquid material is being dried outdoor atomization, preheats
Enter vacuum drying pipe afterwards, ensure that the uniformity of droplet and do not produce wall sticking phenomenon, also easily realize nebulizer microwave screen
Cover and avoid nebulizer that gas discharge phenomenon and nozzle localized hyperthermia occur under vacuum conditions, stopped nozzles are atomized；Microwave adds
Heat and vacuum drying adopt separate design, and microwave source, along microwave heating chamber Spiral distribution, realizes microwave in microwave vacuum drying pipe
The uniformity of field；Microwave controller and water load are implemented in combination with that microwave power is interior on a large scale to be continuously adjusted.In addition, in dry run
Middle charging and evacuation realize interlocking it is ensured that dried material is difficult to be pumped by vacuum.The present invention is carried out to atomized drop before being dried
Preheat, temperature is low, do not affect dry products quality.
Li Huaguo (2004) discloses " vacuum atomizing microwave drying system " patent (patent authorization number
Zl03259987.0).This patent magnetron is in vacuum drying cabinet microwave field, is susceptible to low pressure gaseous discharge；In addition, spray
Mouth is also in microwave field, is also susceptible to gas discharge and nozzle local produces high temperature, stopped nozzles are atomized；Therefore, this is special
Profit is it cannot be guaranteed that spraying vacuum drying normally runs.The difference of the present invention is that liquid material is being dried outdoor atomization, microwave
Heating chamber is separated with hothouse, it is to avoid low pressure gaseous discharge generation, and microwave power controller is combined reduction microwave with water load
Power level, in addition, charging and evacuation realize interlocking it is ensured that dried material is difficult to be pumped by vacuum.
Dong Tieyou, Zhou Dongju, Ren Fazheng, Chen Shuxing, Cui Jianyun, Ge Keshan, Jiang Yong, He Jia, Zhao Qimei (2009 years) is public
Open " microwave spraying vacuum drying machine " utility model patent (patent authorization number zl200720310413.5).At this patented nozzle
In microwave field, it is susceptible to gas discharge and nozzle local produces high temperature, stopped nozzles are atomized；Microwave source heats material in advance
Liquid, the penetrance of impact microwave, reduces the indoor microwave field electric field intensity of vacuum drying, affects drying efficiency；In addition, vacuum system
Material particles are also easily taken away in continuous work.The difference of the present invention is that liquid material is being dried outdoor atomization, microwave heating
Chamber is separated with hothouse, it is to avoid low pressure gaseous discharge generation, is easy to material cleaning in drying tube, microwave source directly acts on dry
Dry pipe is it is ensured that microwave power required for hothouse.In addition, charging with evacuation realize interlock it is ensured that dried material be difficult true
Sky pumps.
Li Sheng, Liu Gang (2008) disclose " microwave vacuum spray drying equipment " utility model patent (patent authorization number
Zl200720031027.2).This patented nozzle is in microwave field, is susceptible to gas discharge and nozzle local produces high temperature,
Stopped nozzles atomization, impact drying efficiency；Microwave power is not carried out continuously adjusting, and brings vacuum drying cabinet microwave field electric-field strength
Spend height, affect dry products quality, vacuum drying cabinet and microwave heating chamber integrated design easily bring dried material micro-
Ripple feedback is salty long-pending, causes material localized hyperthermia.The difference of the present invention is that liquid material is being dried outdoor atomization, microwave heating
Chamber is separated with hothouse, it is to avoid low pressure gaseous discharge generation, also allows for material cleaning, and microwave power controller is tied with water load
Close and reduce microwave power intensity, improve the product drying uniformity, in addition, charging and evacuation realize interlocking it is ensured that dried material
It is difficult to be pumped by vacuum.
Xu Wei (2011) discloses a kind of " microwave spray-driving esterification apparatus " utility model patent (patent authorization number
Zl201120183496.5).This patent does not design vacuum system, belongs to normal pressure spray, and nozzle is arranged on microwave heating intracavity,
Also easily bring and make nozzle local produce high temperature, stopped nozzles are atomized.The difference of the present invention is in negative pressure for spray drying
Under carry out, liquid material separated with hothouse outdoor atomization, microwave heating chamber are dried, it is to avoid low pressure gaseous discharge is sent out
Raw, microwave power controller is combined reduction microwave power intensity with water load, in addition, charging interlock with evacuation realization it is ensured that
Dried material is difficult to be pumped by vacuum.
" design of Fructus Musae vacuum spray drying device is imitated with application along having carried out for Chen Ruipeng, Zhang Yan, Chen Junfei, profundity, Cao
Really " study (Guizhou Agricultural Sciences 2014,42(8): 240～242).Fructus Musae liquid dispersion is formed by this research using high voltage electric field
Uniform particle sizes' mist droplet, the uniform-mist of formation drops in vacuum drying interior and is frozen into below eutectic temperature, then higher
Vacuum condition under by sublimation drying remove object in moisture, finally in very short time, Fructus Musae feed liquid is dried to Fructus Musae powder
Finished product.This research is not used microwave as dried medium, and drying mode is lyophilizing.The difference of the present invention is to be spray-dried
Carry out under negative pressure, liquid material is divided with hothouse as drying source, microwave heating chamber in dry outdoor atomization, microwave
Be combined reduction microwave power intensity with water load from, microwave power controller, in addition, charging realize interlocking with evacuation it is ensured that
Dried material is difficult to be pumped by vacuum.
Hu Jiqiang, with milk powder raw material carry out microwave vacuum atomizing freeze drying technology and equipment research (China Dairy Industry,
2012,40(2): 42～44).The drying mode that this research adopts is dried for microwave vacuum freeze, is not microwave vacuum spray dried
Dry technology, vacuum spraying is the milk powder drop after pre-cooling atomization.But the difference of the present invention is liquid material in hothouse
Outer atomization, microwave is vacuum dried thermal source after providing liquid material atomization, in addition, charging realizes interlocking with evacuation it is ensured that being dried
Material is difficult to be pumped by vacuum.
Yang Liansheng, Luo Faxing, with liquid sugar as raw material, have carried out different sugar liquid de values, concentration and temperature and microwave vacuum have been sprayed
The influence research (food industry science and technology, 1997,5:73～75) of mist dry products moisture and density.Result of study shows, microwave
Spray drying has the advantages that low temperature, low consumption, quick, finished product lighter color, light transmittance are high, rehydration is good.But, this institute
Adopt drive nozzle mode with experimental facilitiess nebulizer, drop has uneven and easy wall sticking phenomenon；Drop initial temperature is high, micro-
Wave power can not continuously adjust, furthermore vacuum system is constantly in working condition, easily pumps dried material.In addition, nozzle is micro-
Wave screen is covered and is not solved.The difference of the present invention is that liquid material is being dried outdoor atomization, easily realizes shielding, microwave power
Controller and water load are implemented in combination with that microwave power is interior on a large scale to be continuously adjusted；In addition, charging with evacuation realize interlocking it is ensured that
Dried material is difficult to be pumped by vacuum；Furthermore, the present invention preheats to atomized drop, and temperature is low, does not affect the dry product of material
Matter, can improve drying efficiency simultaneously.
In a word, ultrasonic atomization pulse microwave vacuum drying method and device, are not reported at home, abroad up till now
Till do not retrieve paper and the patent of this respect yet. the present invention will be a kind of innovation, be to this technological gap domestic
Fill up.
Content of the invention
It is an object of the invention to provide one kind ultrasonic atomization, microwave and pulsed feeds with pumping joint subsidiary conditions under
Realize liquid material efficiently, uniformly, low temperature, inexpensive microwave spraying vacuum drying and lifting liquid material conventionally spray-dried product
The method and device of matter.
Technical scheme, one kind is used for liquid material ultrasonic atomization pulse microwave Minton dryer, comprising:
Soniclizer, atomizing heater, pulse inlet valve, vacuum drying pipe, microwave heating chamber, water load, product collector, arteries and veins
Rush vacuum valve, gas-particle separation device, discharger, cooler, refrigeration unit, vacuum pump assembly and switch board；
Soniclizer is connected with atomizing heater, atomizing heater with vacuum drying pipe is connected, vacuum drying pipe and
Gas-particle separation device connects；Gas-particle separation device side is connected with cooler, and cooler passes through refrigeration unit and vacuum pump assembly drives
It is dynamically connected；Gas-particle separation device bottom is connected with discharger；
It is provided with pulse inlet valve between described atomizing heater and vacuum drying pipe；Gentle-solid separator is managed in vacuum drying
Between be provided with pulse Vacuum valve；Vacuum drying pipe lower end is provided with product collector；Described vacuum drying pipe is located at microwave heating chamber
Inside, is additionally provided with water load in microwave heating intracavity；Operated by switch board control system.
Described vacuum drying pipe is independent mutually with microwave heating chamber, and vacuum drying pipe is disposed vertically in microwave heating chamber
Interior.The internal diameter of described vacuum drying pipe is 200-1000mm, and bottom is taper, also includes several optical fiber temperature-measurement openings；Material
For the low glass material of high temperature resistant, microwave absorbability.
Described microwave heating chamber is cylindrical container, and two ends are sealed with end socket, and microwave source is uniformly distributed it along the hand of spiral
Surrounding.
The described method being dried for liquid material ultrasonic atomization pulse microwave Minton dryer, step is such as
Under:
Take liquid material to be dried, enter in soniclizer and be atomized into drop, open the electricity of soniclizer
Source switch, frequency is 1.0-10mhz；Atomization speed in 0-5l/min range regulation, then passes through atomization and adds according to microwave power
Hot device is preheated at 50-80 DEG C；When reaching design temperature inside atomizing heater, open water load successively, microwave adds
The microwave source in hot chamber and refrigeration unit；
When temperature reaches setting value in vacuum drying tube, open vacuum pump assembly and pulse Vacuum valve, work as vacuum drying
When the vacuum of pipe reaches setting value, starting impulse inlet valve；Material after atomization passes through pulse inlet valve in a pulsed fashion
Enter in vacuum drying pipe and be dried；The gas producing in dry run is excluded in a pulsed fashion by pulse Vacuum valve；
After atomization drying terminates, stop vacuum pump assembly, after vacuum drying overpressure returns to normal pressure, open vacuum
The valve of drying tube bottom, dried material enters product collector.
Pulse feed valve opening time interval and opening time are set by switch board.
Described pulse Vacuum valve is interlocked with pulse inlet valve；I.e. pulse inlet valve work time pulse rushes vacuum valve and closes, conversely,
When pulse inlet valve is closed, pulse vacuum valve is opened.
Beneficial effects of the present invention:
1st, reduce product drying temperature, improving product quality: because liquid material is dried under vacuum, moisture evaporation
Low boiling point, meanwhile, microwave source is pressed the hand of spiral along heating chamber and is distributed, and microwave feedback open area is big, the indoor microwave field of vacuum drying
It is evenly distributed, product drying temperature is low compared with conventionally spray-dried and uniform drying.
2nd, improve drying efficiency, reduce energy expenditure: because microwave has endogenous pyrogen heat characteristic, the efficiency of heating surface is high, does
It is heated inside and outside the atomized drop of dry interior, atomized drop is dried under vacuum conditions simultaneously, increases atomized drop inside and outside differential pressure simultaneously,
Rate of drying is fast compared with conventionally spray-dried, and drying efficiency is high, and empty calory is lost.
3rd, non-environmental-pollution, investment are little, easy to operate: because microwave is clean energy resource, and drying tube is added using resistance to microwave
The again inexpensive glass material that heat, microwave absorbability are low, high temperature resistant, low temperature, coefficient of friction are low makes, and saves huge the doing of tradition
Dry cavity, compared with conventionally spray-dried equipment, no industrial waste gas, device structure be simple, investment is little, easy to operate.
Brief description
Fig. 1 is present configuration schematic diagram.
Description of reference numerals: 1, soniclizer；2nd, atomizing heater；3rd, pulse inlet valve；4th, vacuum drying pipe；5、
Microwave heating chamber；6th, water load；7th, product collector；8th, pulse Vacuum valve；9th, gas-particle separation device；10th, discharger；11st, cool down
Device；12nd, refrigeration unit；13rd, vacuum pump assembly；14th, switch board.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in further detail.
Embodiment 1
As shown in figure 1, a kind of be used for the vacuum drying device of liquid material ultrasonic atomization pulse microwave, comprising: ultrasonic
Ripple nebulizer 1 and atomizing heater 2, also include pulse inlet valve 3, vacuum drying pipe 4, microwave heating chamber 5, water load 6, product
Catcher 7, pulse Vacuum valve 8, gas-particle separation device 9, discharger 10, cooler 11, refrigeration unit 12, vacuum pump assembly 13 and
Switch board 14 is constituted.
Soniclizer 1 connects atomizing heater 2, and pulse inlet valve 3 is located at vacuum drying pipe 4 top, imports and exports logical
Piping is connected with atomizing heater 2, vacuum drying pipe 4 import respectively, and vacuum drying pipe 4 is vertically disposed in microwave heating chamber 5
Interior, vacuum drying pipe 4 bottom is connected with product collector 7, and microwave heating chamber 5 is cylindrical container, and two ends are sealed with end socket, micro-
Wave source is uniformly distributed its surrounding along the hand of spiral；Pulse Vacuum valve 8 is arranged on vacuum drying pipe 4 top in microwave heating chamber 5, and
It is connected with gas-particle separation device 9.Gas-particle separation device 9 bottom is connected with discharger 10 by pipeline, and top is connected with cooler 11,
Cooler 11 is connected with refrigeration unit 12 and vacuum pump assembly 13.Water load 6 is arranged in microwave heating chamber 5, and is entered by water pump
Row water circulation.
Due to liquid material under microwave vacuum state atomization drying, can achieve that liquid material is high using the method and device
Effect energy-conservation is uniformly dried, and reduces product drying temperature, improves the purpose of product quality.
Soniclizer 1 is the device that liquid material is atomized into droplet, and atomizing heater 2 is used for improving material before drying
Initial temperature, pulse inlet valve 3 control droplet enter vacuum drying pipe 4 in atomized drop interval time, microwave heating
Chamber 5 provides droplet drying in vacuum drying pipe to need heat, and in vacuum drying pipe 4, microwave field electric field intensity is controlled by microwave
Device and water load 6 combine regulation, pulse Vacuum valve 8 realizes interlocking with pulse inlet valve 3, and when preventing from feeding, droplet is by gas band
Walk, the vapor that in dry run, material particles produce is lowered the temperature in cooler 11 through gas-particle separation device 9, chiller temperature is by making
Cold group 12 controls, and in vacuum drying pipe, vacuum pressure is maintained by vacuum pump assembly 13.After dry materials terminate, open valve,
Material particles enter product collector 7 from vacuum drying bottom of the tube.
The present invention adopts ultrasonic atomization, and microwave heating, feed pulse control mode realize liquid material in vacuum drying
Manage atomization microwave vacuum drying, change conventionally spray-dried mode, improve during droplet dry materials heat exchange efficiency and
Area, reduce the baking temperature of droplet, have that uniform drying, quality height, efficiency high, small investment, energy consumption be low, cost is low excellent
Point.
Embodiment 2
Take the maltodextrin solution 500ml that mass concentration is 6%, the atomization put in soniclizer 1 is indoor, opens
Ultrasonic atomization appliance mains switch, regulation atomization speed to 100ml/min.Open atomizing heater 2 power supply, temperature sets 60
DEG C, when atomizing heater internal temperature reaches 60 DEG C, open water load 6, microwave heating chamber 5 microwave source and refrigeration unit successively
12, microwave power is detected by Fibre Optical Sensor according to setting temperature of charge setting value adjust automatically, temperature of charge, cooler
11 temperature control is in the range of -15-5 DEG C.
When temperature reaches 95 DEG C of setting value in vacuum drying tube 4, open vacuum pump assembly 13 and pulse Vacuum valve 8, when
When in vacuum drying pipe 4, vacuum reaches setting value 10kpa, starting impulse inlet valve 3, atomized drop enters vacuum drying pipe 4
Inside it is dried.It is spaced apart 10s in switch board 14 setting pulse inlet valve 3 opening time, the opening time is 1s, control vacuum to do
In dry pipe 4, during drop enters vacuum drying pipe, vacuum degree is less than 20kpa.
Pulse Vacuum valve 8 is interlocked with pulse inlet valve 3, and that is, pulse inlet valve 3 work time pulse rushes vacuum valve 8 and closes, otherwise
Open pulse Vacuum valve 8.Record temperature value, vacuum degree in vacuum drying pipe 4 every 1min in dry run.Atomization drying
After end, stop vacuum pump assembly 13, after pressure returns to normal pressure in vacuum drying pipe 4, open vacuum drying pipe 4 lower valve
Door, the maltodextrin powder being dried enters product collector 7.
Maltodextrin ultrasonic atomization pulse microwave is vacuum dried the Task-size Controlling of powder in 5-100 μ m.
Embodiment 3 Folium Camelliae sinensis extract ultrasonic atomization pulse microwave vacuum drying method
The fresh tea leaf that mass concentration is 15% is taken to extract solution 500ml, the atomization put in soniclizer 1 is indoor,
Open soniclizer 1 on and off switch, atomization speed is transferred to 80ml/min.Open atomizing heater 2 power supply, temperature sets 50
DEG C, when atomizing heater 2 internal temperature reaches 50 DEG C, open water load 6, microwave heating chamber 5 microwave source, and refrigeration machine successively
Group 12, microwave power is detected by Fibre Optical Sensor according to setting temperature of charge setting value adjust automatically, temperature of charge, cooling
The temperature control of device 11 is in the range of -15-5 DEG C.
When temperature reaches 85 DEG C of setting value in vacuum drying tube 4, open vacuum pump assembly 13 and pulse Vacuum valve 8, when
When in vacuum drying pipe 4, vacuum reaches setting value 7kpa, starting impulse inlet valve 3, atomized drop enters in vacuum drying pipe 4
It is dried.It is spaced apart 6s in switch board 14 setting pulse inlet valve 3 opening time, the opening time is 1s, controls vacuum drying
In pipe 4, vacuum vacuum degree during drop enters vacuum drying pipe 4 is less than 15kpa.
Pulse Vacuum valve 8 is interlocked with pulse inlet valve 3, and that is, pulse inlet valve 3 work time pulse rushes vacuum valve 8 and closes, otherwise
Open pulse Vacuum valve 8.Record temperature value, vacuum degree in vacuum drying pipe 4 every 1min in dry run.Atomization drying
After end, stop vacuum pump assembly 13, after pressure returns to normal pressure in vacuum drying pipe 4, open vacuum drying pipe 4 lower valve
Door, the Folium Camelliae sinensis extract powder being dried enters product collector 7.
Folium Camelliae sinensis extract ultrasonic atomization pulse microwave is vacuum dried the Task-size Controlling of powder in 10-120 μ m.
Claims (7)
1. one kind is used for liquid material ultrasonic atomization pulse microwave Minton dryer it is characterised in that including: ultrasonic fog
Change device (1), atomizing heater (2), pulse inlet valve (3), vacuum drying pipe (4), microwave heating chamber (5), water load (6), produce
Product catcher (7), pulse Vacuum valve (8), gas-particle separation device (9), discharger (10), cooler (11), refrigeration unit (12),
Vacuum pump assembly (13) and switch board (14)；
Soniclizer (1) is connected with atomizing heater (2), and atomizing heater (2) is connected with vacuum drying pipe (4), vacuum
Drying tube (4) is connected with gas-particle separation device (9)；Gas-particle separation device (9) side is connected with cooler (11), and cooler (11) leads to
Cross refrigeration unit (12) to drive, and cooler (11) is connected with vacuum pump assembly (13)；Gas-particle separation device (9) bottom and discharging
Device (10) connects；
It is provided with pulse inlet valve (3) between described atomizing heater (2) and vacuum drying pipe (4)；Vacuum drying pipe (4) gentle-
It is provided with pulse Vacuum valve (8) between solid separator (9)；Vacuum drying pipe (4) lower end is provided with product collector (7)；Described vacuum
Drying tube (4) is located at microwave heating chamber (5) inside, is additionally provided with water load (6) in microwave heating chamber (5)；
This drying device is controlled to operate by switch board (14).
2. according to claim 1 be used for liquid material ultrasonic atomization pulse microwave Minton dryer it is characterised in that:
Both are independent mutually for described vacuum drying pipe (4) and microwave heating chamber (5), and vacuum drying pipe (4) is disposed vertically in microwave heating
In chamber (5).
3. according to claim 1 be used for liquid material ultrasonic atomization pulse microwave Minton dryer it is characterised in that:
The internal diameter of described vacuum drying pipe (4) is 200-1000mm, and bottom is taper, also includes several optical fiber temperature-measurement openings；Material
For glass material.
4. according to claim 1 be used for liquid material ultrasonic atomization pulse microwave Minton dryer it is characterised in that:
Microwave heating chamber (5) is cylindrical container, and two ends are sealed with end socket, and microwave source is uniformly distributed its surrounding along the hand of spiral.
5. the side by being dried for liquid material ultrasonic atomization pulse microwave Minton dryer described in claim 1
Method is it is characterised in that step is as follows:
Take liquid material to be dried, enter in soniclizer (1) and be atomized into drop, open soniclizer (1)
On and off switch, frequency is 1.0-10mhz；Atomization speed adjusts in the range of 0-5l/min according to microwave power, then passes through mist
Change heater (2) to be preheated at 50-80 DEG C；When reaching design temperature inside atomizing heater (2), open water successively and bear
Load (6), the microwave source of microwave heating chamber (5) and refrigeration unit (12)；
When temperature reaches setting value in vacuum drying tube (4), open vacuum pump assembly (13) and pulse Vacuum valve (8), surely
When the vacuum of empty drying tube (4) reaches setting value, starting impulse inlet valve (3)；Material after atomization passes through pulse inlet valve
(3) enter in vacuum drying pipe (4) in a pulsed fashion and be dried；The gas producing in dry run passes through pulse Vacuum valve
(8) exclude in a pulsed fashion；
After atomization drying terminates, stop vacuum pump assembly (13), after pressure returns to normal pressure in vacuum drying pipe (4), open
The valve of vacuum drying pipe (4) bottom, dried material enters product collector (7).
6. the side being dried for liquid material ultrasonic atomization pulse microwave Minton dryer according to claim 5
Method it is characterised in that: by switch board (14) set pulse inlet valve (3) opening time interval and the opening time.
7. the side being dried for liquid material ultrasonic atomization pulse microwave Minton dryer according to claim 5
Method it is characterised in that: described pulse Vacuum valve (8) and pulse inlet valve (3) interlock；I.e. pulse inlet valve (3) work time pulse punching
Vacuum valve (8) cuts out, otherwise when pulse inlet valve (3) is closed, pulse vacuum valve (8) is opened.
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| CN201510352097.7A CN104896877B (en) | 2015-06-24 | 2015-06-24 | Ultrasonic atomizing and pulse microwave vacuum drying device for liquid material and drying method |
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| CN105747151A (en) * | 2016-03-03 | 2016-07-13 | 江南大学 | Preparation method of pure fruit and vegetable powder |
| CN107510600A (en) * | 2017-08-07 | 2017-12-26 | 苏州大学 | A kind of device and method for preparing medicinal solid particulate |
| CN110296578B (en) * | 2019-06-28 | 2021-08-24 | 京东方科技集团股份有限公司 | Drying method and drying equipment |
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| CN1048525C (en) * | 1997-04-18 | 2000-01-19 | 华南理工大学 | Method for microwave and vacuum atomizing and drying sugar liquid and its device |
| JP2001194067A (en) * | 2000-01-12 | 2001-07-17 | Chiyoda Manufacturing Co Ltd | Operation method of microwave dryer |
| JP2001194066A (en) * | 2000-01-12 | 2001-07-17 | Chiyoda Manufacturing Co Ltd | Microwave dryer |
| CN2650039Y (en) * | 2003-08-01 | 2004-10-20 | 李华国 | Vacuum spray microwave drying system |
| CN100414232C (en) * | 2004-11-05 | 2008-08-27 | 刘贤英 | Vacuum spray drying method for liquid material and vacuum continuous spray drying machine |
| JP5252261B2 (en) * | 2007-08-02 | 2013-07-31 | 兼松エンジニアリング株式会社 | Vacuum, drying / concentration system |
| JP6090967B2 (en) * | 2012-03-17 | 2017-03-08 | 西光エンジニアリング株式会社 | Steam / microwave combination vacuum dryer |
| CN102987524B (en) * | 2012-12-06 | 2013-12-11 | 江南大学 | Pulse spouted microwave freeze-drying device for granular conditioning food and homogenization efficient processing method |
| CN102972848B (en) * | 2012-12-12 | 2014-02-19 | 江南大学 | Intermediate wave infrared and pulse vacuum drying integrated device of granulate prepared food and using method thereof |
| JP6062317B2 (en) * | 2013-04-26 | 2017-01-18 | 恵子 河▲崎▼ | Food vacuum drying method and apparatus |
| CN204854168U (en) * | 2015-06-24 | 2015-12-09 | 江南大学 | Be used for liquid material ultrasonic atomization pulse microwave vacuum drying device |
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