CN100424453C - Microwave vacuum continuous drier with two drying chambers and method using the same - Google Patents
Microwave vacuum continuous drier with two drying chambers and method using the same Download PDFInfo
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- CN100424453C CN100424453C CNB2005100430782A CN200510043078A CN100424453C CN 100424453 C CN100424453 C CN 100424453C CN B2005100430782 A CNB2005100430782 A CN B2005100430782A CN 200510043078 A CN200510043078 A CN 200510043078A CN 100424453 C CN100424453 C CN 100424453C
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Abstract
The present invention mainly relates to the structure of a microwave drier, especially a structure of a microwave vacuum drier. A microwave vacuum continuous drier with two drying chambers, includes a tank (A), a hoisting system (8), a vacuum system (9), wherein a delivery device (6) is disposed in the tank (A), and a discharging device (5) below the delivery device (6), characterized by including a microwave vacuum drying chamber (A3) in the tank (A), a microwave heater system (1) on the wall of the tank (A) of the microwave vacuum drying chamber (A3), a separating plate (2) on one side of the microwave vacuum drying chamber (A3) to form a vacuum cooling solidifying chamber (A4). The driving belt (64) of the delivery device (6) traverses the window (21) arranged on the separating plate (2). On one end of the tank (A) is arranged with the microwave vacuum drying chamber (A3) and on the other end is the vacuum cooling solidifying chamber (A4). The separating plate (2) separates the two chambers to make the temperature have the obvious gradient. The invention adopts the way of microwave radiation heating, utilizing the characters of microwave high efficiency, easy to control, antisepsis, sterilization, fast heating, even heating, fast dehydration, preserving to reduce the power waster and advance the efficiency.
Description
Technical field:
The present invention relates generally to a kind of structure of microwave dryer, relates in particular to the structure of microwave vacuum dryer.
Background technology:
Traditional dry materials, especially in the Chinese medicine concentration technology, because extract generally is the material of thick glue shape, because it is thickness relatively, inside is difficult for parching, thus use conventional furnace drying method, as steam drying or vacuum drying exist the cycle long, power consumption is big, efficient is low, heat inhomogeneous, shortcomings such as fresh keeping property difference.In order to address the above problem, China Patent No. 03243669.6, the name be called " medicinal extract microwave vacuum dryer " patent disclosure a kind of scheme, on the basis of former heating in vacuum, increased heating using microwave, it is unaffected to utilize microwave energy energy under vacuum state to transmit, and makes the medicine water evaporates, reaches quick-drying purpose.The problem that this scheme exists be material in the process of heating because its technology is discontinuous,, can not adapt to the needs that the pharmaceutical factory of traditional Chinese medicine produces so efficient is lower.
China Patent No. 01255151.1, the name be called " clear liquid low temperature automatic drier " patent disclosure another scheme, on the vacuum drier transport tape " order is equipped with steam heat radiant panel, continuous several piece heat radiation plate, cold plate ", higher to run to temperature lower from temperature on transport tape to make material, so because thermograde and not obvious its dry material can not reach the water content below 7%.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of microwave vacuum continuous drier that has two drying chambers is provided.
Purpose of the present invention can be by realizing by the following technical solutions: a kind of microwave vacuum continuous drier that has two drying chambers, comprise tank body A, feeding system 8, vacuum system 9, in tank body A, be provided with conveyer 6, be provided with drawing mechanism 5 below conveyer 6, its main feature is also to include to be provided with the A of microwave vacuum drying chamber in tank body A
3, at the A of microwave vacuum drying chamber
3The wall of tank body A be provided with microwave heating system 1, at the A of microwave vacuum drying chamber
3A side be provided with partition panel 2, form vacuum cooled curing room A
4The driving-belt 64 of conveyer 6 passes partition panel 2 and is provided with hole 21.End at tank body A is the A of microwave vacuum drying chamber
3, the other end is vacuum cooled curing room A
4, partition panel 2 is separated two Room, makes temperature that tangible gradient be arranged.Partition panel 2 adopts the way of metallic plate sealing microwave, because the metallic plate that is adopted does not absorb microwave energy, and microwave reflection can be gone out.So just avoid the cooling section water load to absorb microwave and to the influence of material cooling effect, thereby caused the waste of power, reduced the power consumption of complete machine.
The described microwave vacuum continuous drier that has two drying chambers also includes at partition panel 2 vacuum cooled curing room A
4A side be provided with TVS 3, the driving-belt 64 of conveyer 6 passes TVS 3 and is provided with hole 31.TVS 3 has sale of finished goods on market, its major function is for absorbing microwave energy.
The way that TVS 3 adopts mineral carbon loads to absorb and the water load absorption is used because when microwave frequency 3000MHZ the relative dielectric constant of water be 77 and graphite have the ability that absorbs microwave more by force equally.Adopt restraining device, the microwave that can avoid closure plate to reveal enters cooling section, prevents the interference of microwave to cooling, thereby satisfies the effect of cooling, guarantees aridity.
The described microwave vacuum continuous drier that has two drying chambers also includes at partition panel 2 vacuum cooled curing room A
4A side and/or TVS 3 after, be provided with cooling device 4 around the top of conveyer 6 driving-belts 64.Cooling device 4 can make the temperature of charge on the transport tape reduce, and under vacuum condition, makes its transpiring moisture once more, reaches dry purpose.TVS 3 is graphite, metal TVS or water TVS.
According to the requirement of different material to temperature, cooling device 4 is for recirculated water cooling pipe 41 or be provided with condenser 43 below driving-belt 64.Be provided with anti-draining board 42 between cooling device 4 and driving-belt 64, and can be provided with water receiving tank 44, water receiving tank is communicated with tank body A bottom and is provided with steam trap connection A
2, condensed water is passed through outside the water receiving tank drain tank.Anti-draining board 42 is herringbone or is hang plate.Condensed water on the plate can import water receiving tank along incline direction, and can not splash in the material, and material is reached the effect that further cools with the water vapour evaporation, reaches dry effect, conveniently enters next process.
Microwave heating system, microwave frequency is at the electromagnetic wave of 300 megahertzes to three gigahertzs.Heated medium is the hydrone in the material, is polar water molecules.Polar water molecules is under the effect of fast-changing electromagnetic field of high frequency, and its polarity orientation will change along with the variation of external electric field, causes the motion and the mutual just so-called heating effect of friction effect of molecule.The frequency of the magnetron that microwave is present mainly contains 915MHz and 2450MHz two big series, and heating mainly is the heating hydrone, so microwave heating technique generally is applied to contain the medium of moisture.And animal-plant material all is the medium that contains moisture basically, so microwave heating technique is applied to particularly Chinese herbal medicine processing industry of food and medicine more.
The described using method that has the microwave vacuum continuous drier of two drying chambers is characterized in the A of microwave vacuum drying chamber
3Temperature at 30 ℃-100 ℃; Vacuum is 0.005MP-0.05MP; Indoor running time 5-30min.Described vacuum cooled curing room A
4Temperature at 0 ℃-40 ℃; Vacuum is 0.005MP-0.05MP; Indoor running time 5-10min.
In actual production, it is can not be withering under hot conditions that many article are arranged, as high-grade Chinese medicinal herbses such as some medicines, chemicals, nutraceutical and genseng, pilose antlers.In order to guarantee product quality, its dry processing must be carried out being lower than under the condition of 100 ℃ or room temperature.As everyone knows, air pressure reduces, and the boiling point of water also reduces, as under an atmospheric pressure (101.3kp), the boiling point of water is 100 ℃, and under 0.073 atmospheric pressure, the boiling point of water is 40 ℃, and under vacuum condition, heating object can make interior of articles moisture evaporate under no temperature rising state.Because cross-ventilation is difficult to carry out under the vacuum condition, only the mode of reliable conduction provides heat energy for material, and the conduction of velocity of conventional vacuum drying method is very slow, and efficient is low, and temperature control difficulty is big, is heated material and also can produces internal-external temperature difference.And heating using microwave is a kind of radiation heating, is that microwave and material are directly had an effect, and its inside and outside is heated simultaneously, need not or transmit heat by convection current, so firing rate is fast, and drying efficiency height, dry mass height.The activity that can preserve material to greatest extent and the effect of the vitamin in the food, original color and luster and nutritional labeling are also arranged.That is to say that processed food under the vacuum condition also has its fresh-keeping effect.
The invention has the beneficial effects as follows:
Adopt the mode of carry out microwave radiation heating, utilize that microwave is efficient, easily control, sterilization, sterilization, heating rapidly, homogeneous heating, rapid, the fresh-keeping characteristics of dehydration, reduce power consumption, raise the efficiency.
Compare with drying equipment with other dry technologies, have following characteristics:
1. efficient: in the conventional vacuum dryer, (vacuum pressure 7.37kpa, the material dewatering temperature is 40 ℃, the heat-transmission of 1kg steam is 574 kilocalories) because under the vacuum occasion, heat transmits very difficult by convection current, can only conduct and carry out, firing rate is slow, and arid cycle is long, and energy consumption is big.What micro-wave vacuum equipment adopted is that radiation passes energy, is the whole heating of medium, need not other heat catalysis, has avoided above-mentioned shortcoming, so speed is fast, and the efficient height, shorten arid cycle greatly, and energy consumption reduces.Compare with the conventional drying technology, can improve work efficiency more than four times.
2. easily control: be convenient to produce continuously and realize automation, but, be convenient to the adjustment of technological parameter and determine because microwave power rapid adjustment and mertialess characteristics are easy to timely control.
3. equipment volume is little, and installation and maintenance are convenient.
4. good product quality: compare with conventional method, institute's product processed quality improves a lot.
5. microwave equipment has the effect of sterilization, sterilization in addition, the product safety health, and the shelf-life can prolong 2～5 times.
6. heating rapidly: heating using microwave is different with traditional heating mode, does not need heat conducting process.Can in the extremely short time, reach the temperature of heating.
7. homogeneous heating: regardless of each position shape of object, it is to make in the object table simultaneously uniformly penetrating electromagnetic wave (microwave) and produce heat energy.Unlike traditional heating, can produce scorched outside and underdone inside phenomenon.
8. dehydration rapidly: because heating using microwave speed is fast, a fast factor of dewatering speed has just been arranged.Though and vacuum lyophilization also has this condition, because material is that by the distillation dewatering type of water, the process of distillation is very slow, does not also reach rapid dehydrating effect under the situation of freezing.So the desivac spin cycle is long, also just power consumption is big, so desivac is greatly limited in the application widely of industries such as food medicine.
9. efficient energy-saving: generate heat owing to the material that contains moisture absorbs microwave easily, therefore, except that a spot of loss, almost do not have other loss.So thermal efficiency height, energy-conservation.It is more energy-conservation more than 1/3rd than FAR INFRARED HEATING.
10. mildew-resistant, sterilization, fresh-keeping: heating using microwave has heating power and biological effect, can sterilize and mildew-resistant under lower temperature.Because firing rate is fast, the time is short, activity and the vitamin in the food, original color and luster and the nutritional labeling that can preserve material to greatest extent, processed food becomes the real natural food that green innocent character is arranged again.
11. it is easy to control: as long as the control microwave power can be realized heating immediately and stopping.
12. it is safe and harmless: as, to have prevented the microwave leakage effectively because microwave is to be controlled in the metal container and in the waveguide to work.Do not have radiation hazard and discharge of harmful gases, do not produce waste heat and dust pollution, promptly contaminated food is not free from environmental pollution yet.
13. product quality meets national GMP requirement, owing under freezing conditions pulverize, has kept the active ingredient of comminuting matter fully again, has very much the market competitiveness.
Description of drawings:
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing:
Fig. 1 looks schematic diagram for the master of inventive embodiments.
Fig. 2 is the B-B cutaway view of Fig. 1 of the present invention.
Fig. 3 is the schematic diagram of microwave heating system 1 of the present invention.
Fig. 4 is the C-C cutaway view of Fig. 1 cooling device 4 embodiment 1 of the present invention.
Fig. 5 is the C-C cutaway view of Fig. 1 cooling device 4 embodiment 2 of the present invention.
The specific embodiment:
Embodiment: see Fig. 1, Fig. 2, Fig. 3, Fig. 4.The microwave vacuum continuous drier that has two drying chambers comprises tank body A, feeding system 8, and vacuum system 9 is provided with conveyer 6 in tank body A, be provided with drawing mechanism 5 below conveyer 6, is provided with the A of microwave vacuum drying chamber in tank body A
3, at the A of microwave vacuum drying chamber
3The wall of tank body A be provided with microwave heating system 1, at the A of microwave vacuum drying chamber
3A side be provided with partition panel 2, form vacuum cooled curing room A
4The driving-belt 64 of conveyer 6 passes partition panel 2 and is provided with hole 21.End at tank body A is the A of microwave vacuum drying chamber
3, the other end is vacuum cooled curing room A
4, partition panel 2 is separated two Room, makes temperature that tangible gradient be arranged.Partition panel 2 adopts metallic plate sealing microwave.
Conveyer 6 includes at the two ends of support 61 and is fixed with driving wheel 62 and driven pulley 63 respectively, which is provided with driving-belt 64, and rotating shaft one end on the driving wheel 62 stretches out tank body A by dynamic sealing device and is connected with power transmission shaft; Its line shaft is driven mutually by the decelerator with motor E driving.End at driving-belt 64 is provided with elasticity perching knife 69; Be provided with the hairbrush 6a of rotation in the lower end of driving-belt 64.Conveyer 6 is for the flat rubber belting transmission or be the crawler belt transmission.In tank body A, be provided with computer video surveillance 7.Conveyer 6 is provided with rolling wheel 65 on the support above the driving-belt 64 61, with rolling wheel 65 corresponding driving-belts 64 below be provided with and roll dull and stereotyped 67.On the support above the driving-belt 64 61, be provided with cutter 66, with cutter 66 corresponding driving-belts 64 below be provided with and cut off dull and stereotyped 68.Feeding system 8 has stirred tank 81, delivery pump 82 that is connected with pipeline with tank body A and the discharge nozzle 83 that is located at conveyer belt 64 tops in the tank body A.
The material of conveyer 6 is at the A of microwave vacuum drying chamber
3Can be polytetrafluoroethylene (PTFE) or for polypropylene, the material of driving-belt 64 is a polytetrafluoroethylene (PTFE) conveyer belt or for the polypropylene conveyer belt or be the silicon rubber conveyer belt; Can be nonmetal or for metal material at the vacuum cooled curing room.
At partition panel 2 vacuum cooled curing room A
4A side be provided with TVS 3, the driving-belt 64 of conveyer 6 passes TVS 3 and is provided with hole 31.TVS 3 adopts mineral carbon load to absorb and water load absorbs.At partition panel 2 vacuum cooled curing room A
4A side and TVS 3 after, be provided with cooling device 4 around the top of conveyer 6 driving-belts 64.Cooling device 4 is for recirculated water cooling pipe 41 or be provided with condenser 43 below driving-belt 64.Be provided with anti-draining board 42 between cooling device 4 and driving-belt 64, and can be provided with water receiving tank 44, water receiving tank is communicated with tank body A bottom and is provided with steam trap connection A
2, condensed water is passed through outside the water receiving tank drain tank.Anti-draining board 42 is the herringbone plate.
The frequency 915MHz of the magnetron that microwave is present, heating mainly is the heating hydrone.
Embodiment 2: have the microwave vacuum continuous drier of two drying chambers, cooling device 4 is provided with condenser 43 below driving-belt 64.Be provided with anti-draining board 42 between cooling device 4 and driving-belt 64, and can be provided with water receiving tank 44, water receiving tank is communicated with tank body A bottom and is provided with steam trap connection A
2, condensed water is passed through outside the water receiving tank drain tank.Anti-draining board 42 is a hang plate.All the other structures are identical with last example.
Embodiment 3: flu medicinal extract, 10 kilograms, 20 minutes running times, powdering, moisture 4%.
| Flu medicinal extract | Microwave power | Temperature | Vacuum | The speed of service | Running time | Driving-belt length | Initial aqueous % | The dry moisture % in back | |
| Microwave vacuum drying chamber | 10kw | 47 ℃ | 0.08MP | 0.25m/min | 20min | 5m | 43％ | ||
| The vacuum cooled curing room | 8 ℃ | 0.08MP | 0.25m/ | 8min | 2m | 4％ |
Technological process of the present invention is to take out vacuum and preheating stirred tank in the chamber earlier, then material to be processed is drawn in the stirred tank by vacuum system, by stirred tank material is carried out pre-thermal agitation, the back material that stirs is delivered to via delivery pump on the conveyer belt of nonmetal inner chamber of sealing, evenly heat by microwave generator again, material evenly is rolled into pie through rolling wheel, utilize vacuum and carry out microwave radiation heating, the heating object internal moisture is evaporated under the state that tepor rises, the a large amount of water vapours that produced are extracted out by supporting vacuum system, because of microwave heating chamber, insulation and cooling chamber are isolated by closed system and restraining device, do not reveal so can not produce microwave, also can be because of the microwave of restraining device hyperabsorption, thereby cause the loss of energy, after evaporation process finished, material was sent to cooling section through conveyer belt, reached the purpose of further drying, after cooling procedure finishes, material enters in the propeller, by propeller material is pushed into the vacuum discharge system, guarantees the continuity of discharging.In the course of the work, operating personnel can pass through surveillance 7 real time monitoring production processes, after drying finishes, can select cleaning procedure on the throne, clean inner chamber by shower nozzle, the water of cleaning is discharged via steam trap connection, finish up to cleaning, the whole production workflow has just been finished.
Claims (9)
1. microwave vacuum continuous drier that has two drying chambers, comprise tank body (A), feeding system (8), vacuum system (9), in tank body (A), be provided with conveyer (6), be provided with drawing mechanism (5) in the below of conveyer (6), it is characterized in that also including in tank body (A) and be provided with (the A of microwave vacuum drying chamber
3), at (the A of microwave vacuum drying chamber
3) the wall of tank body (A) be provided with microwave heating system (1), at (the A of microwave vacuum drying chamber
3) a side be provided with partition panel (2), form vacuum cooled curing room (A
4); The driving-belt (64) of conveyer (6) passes partition panel (2) and is provided with hole (21).
2. the microwave vacuum continuous drier that has two drying chambers as claimed in claim 1 is characterized in that also including at partition panel (2) vacuum cooled curing room (A
4) a side be provided with TVS (3), the driving-belt (64) of conveyer (6) passes TVS (3) and is provided with hole (31), at partition panel (2) vacuum cooled curing room (A
4) a side and/or TVS (3) afterwards, be provided with cooling device (4) around the top of conveyer (6) driving-belt (64).
3. the microwave vacuum continuous drier that has two drying chambers as claimed in claim 2 is characterized in that described TVS (3) is graphite, metal TVS or water TVS.
4. the microwave vacuum continuous drier that has two drying chambers as claimed in claim 2 is characterized in that described cooling device (4) is provided with condenser (43) for recirculated water cooling pipe (41) or in the below of driving-belt (64).
5. the microwave vacuum continuous drier that has two drying chambers as claimed in claim 4, it is characterized in that being provided with anti-draining board (42) being provided with between cooling device (4) and the driving-belt (64), and be provided with water receiving tank (44), be provided with steam trap connection (A in tank body (A) bottom
2).
6. the microwave vacuum continuous drier that has two drying chambers as claimed in claim 5 is characterized in that also including described anti-draining board (42) for herringbone or for hang plate.
7. the microwave vacuum continuous drier that has two drying chambers as claimed in claim 1, it is characterized in that described microwave heating system (1) is provided with microwave feed-in mouth (14) on tank body (A), be provided with nonmetal division board (13) in it, microwave feed-in mouth (14) is provided with excitation cavity (15), is provided with waveguide (12) between microwave source (11) and the microwave feed-in mouth (14); Be provided with many row's microwave feed-in mouths (14) at tank body (A) upper edge circumference.
8. the using method that has the microwave vacuum continuous drier of two drying chambers as claimed in claim 1 is characterized in that the described (A of microwave vacuum drying chamber
3) temperature at 30 ℃-100 ℃; Vacuum is 0.005MP-0.05MP; Indoor running time 5-30min.
9. the using method that has the microwave vacuum continuous drier of two drying chambers as claimed in claim 2 is characterized in that described vacuum cooled curing room (A
1) temperature at 0 ℃-40 ℃; Vacuum is 0.005MP-0.05MP; Indoor running time 5-10min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100430782A CN100424453C (en) | 2005-08-06 | 2005-08-06 | Microwave vacuum continuous drier with two drying chambers and method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100430782A CN100424453C (en) | 2005-08-06 | 2005-08-06 | Microwave vacuum continuous drier with two drying chambers and method using the same |
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| CN1908560A CN1908560A (en) | 2007-02-07 |
| CN100424453C true CN100424453C (en) | 2008-10-08 |
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| CNB2005100430782A Expired - Fee Related CN100424453C (en) | 2005-08-06 | 2005-08-06 | Microwave vacuum continuous drier with two drying chambers and method using the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062525A (en) * | 2010-12-05 | 2011-05-18 | 江南大学 | Negative-pressure microwave uniform spraying and drying device and application |
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| CN200958892Y (en) * | 2006-08-24 | 2007-10-10 | 天水华圆制药设备科技有限责任公司 | Continuous laminated vacuum microwave drier |
| CN101922855B (en) * | 2009-06-10 | 2012-08-08 | 周川 | Microwave continuous freeze-drying system |
| CN102095266A (en) * | 2010-12-28 | 2011-06-15 | 孙秀文 | Water heater utilizing pressure of running water |
| CN102538423A (en) * | 2012-02-10 | 2012-07-04 | 周跃云 | Microwave vacuum drier |
| CN105043029A (en) * | 2015-08-20 | 2015-11-11 | 倪勤华 | Drying method for Chinese medical extract |
| CN109566958A (en) * | 2018-12-12 | 2019-04-05 | 武汉美味源生物工程有限公司 | The method of drying and the sterilizing of the vacuum belt drier and its corn pulp of multiplayer microwave heating and sterilizing |
| CN112615119B (en) * | 2020-12-08 | 2021-07-27 | 四川大学 | Microwave water load |
| CN113730491A (en) * | 2021-09-09 | 2021-12-03 | 辽宁中医药大学 | Microwave vacuum drying process for intelligence-developing depression-relieving traditional Chinese medicine extract |
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| CN1908560A (en) | 2007-02-07 |
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