CN103808109B - A kind of agricultural product drying device and method - Google Patents
A kind of agricultural product drying device and method Download PDFInfo
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- CN103808109B CN103808109B CN201210447018.7A CN201210447018A CN103808109B CN 103808109 B CN103808109 B CN 103808109B CN 201210447018 A CN201210447018 A CN 201210447018A CN 103808109 B CN103808109 B CN 103808109B
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Abstract
A kind of agricultural product drying device and method, the method adopts the microwave energy of microwave drying mechanism and the heat energy stage drying of heat energy drier, and adopt vibrating mechanism to make material in dry run in homogeneous fluidization state, this microwave drying mechanism arranges the first microwave power respectively, second microwave power and the 3rd microwave power, this heat energy drier arranges the first baking temperature respectively, second baking temperature, 3rd baking temperature and the 4th baking temperature, the vibrating motor of this vibrating mechanism arranges the first vibration frequency respectively, second vibration frequency, 3rd vibration frequency and the 4th vibration frequency.This device comprises frame and is arranged on microwave drying mechanism, heat energy drier and the material tray in this frame, and this material tray is arranged relative to this microwave drying mechanism and heat energy drier, goes back involving vibrations mechanism.Invention increases the utilization rate of heat energy and microwave energy, reduce energy consumption for drying, effectively improve the uniformity of microwave drying, improve the quality of product.
Description
Technical field
The present invention relates to a kind of processing of farm products drying device and method, particularly a kind of agricultural product drying device and method adopting the dry fruits and vegetables of vibrating fluidized bed drying and microwave and heat energy piecewise combination.
Background technology
Microwave drying utilizes microwave can carry out the media bulk heating of material, and rate of drying is fast, efficiency is high, energy consumption is low, has stronger technical advantage.China's normal pressure microwave dry technology is equipped in the aspects such as chemical industry, light industry, medical treatment and processing of farm products also to be had and applies comparatively widely, being most widely used of chemical industry and medical industry.But microwave desiccation homogeneity is poor, easily overheatedly occur material edge or pointed part coking, the phenomenons such as product surface sclerosis and inner gelatinization, cause product quality to be fissioned and aggravate, yield rate is low, and the yield rate of microwave drying is often less than 65%.Therefore, the combined drying that combines with other drying of microwave drying is adopted to be one of Main way of developing of dry technology, to give full play to respective technical advantage, weaken the technological deficiency of single drying mode to greatest extent, shorten drying time, improve drying efficiency, improve product quality.
At present, microwave combination dry technology mainly adopts microwave and hot blast, microwave and vacuum, hot blast and several mode such as microwave vacuum, far infrared microwave vacuum, the result of study of combined drying technology indicates efficient, energy-conservation, the high-quality of microwave combination dry technology, but in microwave combination drying equipment, still seriously uneven, the too fast difficulty that causes of rate of drying that there is microwave drying control the technological deficiencies such as material final moisture, and the industrial applications constraining this technology is promoted.Improving the uniformity of microwave drying, is the key technical problem be badly in need of research in Agricultural Products microwave combining drying equipment industrial applications and solved.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of homogeneity question for agricultural product microwave drying, can improve capacity usage ratio, realizes agricultural product drying means and the device of energy-efficient, microwave drying quickly and evenly.
To achieve these goals, the invention provides a kind of agricultural product drying device, comprise frame and be arranged on the microwave drying mechanism in described frame, heat energy drier and material tray, described material tray is arranged relative to described microwave drying mechanism and heat energy drier, wherein, also comprise for making the vibrating mechanism of material in homogeneous fluidization state in dry run, described vibrating mechanism involving vibrations frame, vibrating motor and elastomeric damper member, described vibration frame is arranged in described frame by described elastomeric damper member, described vibrating motor is connected with described vibration frame, described material tray is arranged on described vibration frame, described heat energy drier is arranged on below described material tray, described microwave drying mechanism corresponds respectively to the dry mid-term of described material, dry middle and later periods and the later stage of drying are provided with the first microwave power, second microwave power and the 3rd microwave power, described heat energy drier corresponds respectively to the dry initial stage of described material, dry mid-term, dry middle and later periods and the later stage of drying are provided with the first baking temperature, second baking temperature, 3rd baking temperature and the 4th baking temperature, described vibrating motor corresponds respectively to the dry initial stage of described material, dry mid-term, dry middle and later periods and the later stage of drying are provided with the first vibration frequency, second vibration frequency, 3rd vibration frequency and the 4th vibration frequency.
Above-mentioned agricultural product drying device, wherein, described microwave drying mechanism comprises microwave dryer, microwave source and is arranged on multiple magnetrons on described microwave dryer top, and described multiple magnetron is connected with described microwave source respectively, and it is indoor that described material tray is arranged on described microwave drying.
Above-mentioned agricultural product drying device, wherein, also be provided with draft mechanism, described draft mechanism comprises air-introduced machine and air-inducing passage, described air-introduced machine is arranged on the top of described frame, one end of described air-inducing passage is communicated with described microwave dryer, and the other end of described air-inducing passage is connected with described air-introduced machine.
Above-mentioned agricultural product drying device, wherein, described heat energy drier comprises power supply and electric heating tube group, and described electric heating tube group is connected with described power supply and passes through a support installing in described frame, and described electric heating tube group is arranged on the below of described material tray.
Above-mentioned agricultural product drying device, wherein, described first microwave power is 15 ~ 30W/g, and described second microwave power is 8 ~ 20W/g, and described 3rd microwave power is 5 ~ 15W/g.
Above-mentioned agricultural product drying device, wherein, described first baking temperature and described second baking temperature are for being less than or equal to 75 DEG C, and described 3rd baking temperature is for being less than or equal to 60 DEG C, and described 4th baking temperature is for being less than or equal to 45 DEG C.
Above-mentioned agricultural product drying device, wherein, described first vibration frequency is 35 ~ 50Hz, and described second vibration frequency is 30 ~ 45Hz, and described 3rd vibration frequency and described 4th vibration frequency are 25 ~ 40Hz.
In order to realize above-mentioned purpose better, present invention also offers a kind of agricultural product drying means, wherein, adopt the microwave energy of microwave drying mechanism and the heat energy stage drying of heat energy drier, and adopt vibrating mechanism to make material in dry run in homogeneous fluidization state, described microwave drying mechanism arranges the first microwave power respectively, second microwave power and the 3rd microwave power, described heat energy drier arranges the first baking temperature respectively, second baking temperature, 3rd baking temperature and the 4th baking temperature, the vibrating motor of described vibrating mechanism arranges the first vibration frequency respectively, second vibration frequency, 3rd vibration frequency and the 4th vibration frequency.
Above-mentioned agricultural product drying means, wherein, comprises the steps:
Pre-treatment step, chooses described material, cleans, removes the peel, stripping and slicing, carries out blanching or look is protected in immersion;
Initial stage drying steps, regulates the vibration frequency of described vibrating mechanism to be described first vibration frequency, regulates the baking temperature of described heat energy drier to be the first baking temperature, reduces the moisture of material with the part free moisture removed in described material;
Mid-term drying steps, the vibration frequency of described vibrating mechanism is regulated to be the second vibration frequency, the baking temperature of described heat energy drier is regulated to be the second baking temperature, regulate the microwave power of described microwave drying mechanism to be the first microwave power, carry out internal batch moisture drying and remove the moisture moving to material surface;
Middle and later periods drying steps, the vibration frequency of described vibrating mechanism is regulated to be the 3rd vibration frequency, the baking temperature of described heat energy drier is regulated to be the 3rd baking temperature, regulate the microwave power of described microwave drying mechanism to be the second microwave power, carry out internal batch moisture drying and remove the moisture moving to material surface;
Later stage drying steps, the vibration frequency of described vibrating mechanism is regulated to be the 4th vibration frequency, the baking temperature of described heat energy drier is regulated to be the 4th baking temperature, regulate the microwave power of described microwave drying mechanism to be the 3rd microwave power, with remove described material residual moisture and prevent that the color and luster of dried product from changing, gelatinization and quality cracking.
Above-mentioned agricultural product drying means, wherein, dry moisture transfer point in described initial stage drying steps is 60% ~ 70%, dry moisture transfer point in described mid-term drying steps is 35% ~ 45%, dry moisture transfer point in described middle and later periods drying steps is 15% ~ 25%, and the final moisture content of the described material in described later stage drying steps is less than or equal to 8%.
Technique effect of the present invention is:
The present invention changes the relative motion mode of material at microwave field, mechanical oscillation are adopted to carry out the homogeneous fluidization of material, the superposition of multitube microwave ensures being uniformly distributed of microwave field, the effectively comprehensive high-moisture low cost of heated-air drying of stage drying and the rapidly and efficiently advantage of microwave drying, make material absorb heat energy and microwave energy to greatest extent.Adopt vibration servicing unit, by the vibration requirement regulating vibration frequency to adapt to different material, make material in dry run in homogeneous fluidization state; Adopt multiple microwave magnetron feed-in microwave energy, the microwave reflection superposition in hothouse, obtains uniform microwave field, and realizing material homogeneous heating can be dry.Whole dry run, according to dry materials characteristic, is divided into multiple drying stage by stage drying, regulates the dry run parameter of each drying stage, obtains satisfied drying effect and product quality.The present invention is by this segmentation superpositing vibration householder method, obtain uniform microwave field, ensure material in microwave field in homogeneous fluidization state, improve the utilization rate of heat energy and microwave energy two kinds of energy, reduce energy consumption for drying, effectively improve the uniformity of microwave drying, improve the quality of product, keep the original color and luster of material, smell and flavour to greatest extent, improve dried product qualification rate.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
Fig. 1 is the agricultural product drying device structural representation of one embodiment of the invention;
Fig. 2 is that the microwave feed-in mouth of microwave drying mechanism of the present invention arranges schematic diagram;
Fig. 3 A is multitube microwave field floor map of the present invention;
Fig. 3 B is microwave field distributed in three dimensions schematic diagram of the present invention;
Fig. 4 is the agricultural product drying means flow chart of one embodiment of the invention.
Wherein, Reference numeral
1 frame
11 supports
2 microwave drying mechanisms
21 microwave dryer 22 magnetrons
23 microwave feed-in mouths
3 heat energy drier 31 electric heating tube groups
4 material trays
5 vibrating mechanisms
51 vibration frame 52 vibrating motors
53 elastomeric damper member
6 draft mechanisms
61 air-introduced machine 62 air-inducing passages
Detailed description of the invention
Below in conjunction with accompanying drawing, structural principle of the present invention and operation principle are described in detail:
See the agricultural product drying device structural representation that Fig. 1, Fig. 1 are one embodiment of the invention.Agricultural product drying device of the present invention is natural for dry processing material or cut into bulk, granular fruits and vegetables.Comprise frame 1 and be arranged on microwave drying mechanism 2, heat energy drier 3 and the material tray 4 in described frame 1, described material tray 4 is arranged relative to described microwave drying mechanism 2 and heat energy drier 3, also comprise for making the vibrating mechanism 5 of material in homogeneous fluidization state in dry run, described vibrating mechanism 5 involving vibrations frame 51, vibrating motor 52 and elastomeric damper member 53, described vibration frame 51 is arranged in described frame 1 by described elastomeric damper member 53, plays damping effect and ensures the steadiness of frame 1.This elastomeric damper member 53 is shock-absorbing spring preferably, described vibrating motor 52 is connected with described vibration frame 51, vibrating motor 52 frequency can regulate, material is made in dry run in homogeneous fluidization state by regulating vibration frequency, vibration velocity determines the vibrational state of material, with the fluidised requirement of the material vibrating adapting to difformity size.Described material tray 4 is arranged on described vibration frame 51, be preferably mounted at the top of vibration frame 5, described heat energy drier 3 is arranged on below described material tray 4, described microwave drying mechanism 2 corresponds respectively to the dry mid-term of described material, dry middle and later periods and the later stage of drying are provided with the first microwave power, second microwave power and the 3rd microwave power, described heat energy drier 3 corresponds respectively to the dry initial stage of described material, dry mid-term, dry middle and later periods and the later stage of drying are provided with the first baking temperature, second baking temperature, 3rd baking temperature and the 4th baking temperature, described vibrating motor 52 corresponds respectively to the dry initial stage of described material, dry mid-term, dry middle and later periods and the later stage of drying are provided with the first vibration frequency, second vibration frequency, 3rd vibration frequency and the 4th vibration frequency.Vibrating motor 52 drives vibration frame 51 and material tray 4 to vibrate, and ensures that the material on material tray 4 evenly vibrates, in even fluidizing state.
In the present embodiment, described microwave drying mechanism 2 comprises microwave dryer 21, microwave source (not shown) and is arranged on multiple magnetrons 22 on described microwave dryer 21 top, described multiple magnetron 22 is connected with described microwave source respectively, and described material tray 4 is arranged in described microwave dryer 21.In the present embodiment, described microwave dryer 21 is preferably stainless steel casing, top is provided with 6 magnetrons 22 altogether, adopt the reflection superposition of 6 magnetrons 22, microwave energy is transferred to microwave dryer 21, by the feedback entry position of 6 magnetrons 22 of optimal design microwave dryer 21, ensures that the reflection Downward addition being fed into 6 magnetrons 22 of microwave dryer 21 obtains uniform microwave field, reduce microwave energy coupling loss, improve the uniformity of microwave field.The microwave feed-in mouth being microwave drying mechanism of the present invention see Fig. 2, Fig. 2 arranges schematic diagram.6 described magnetrons 22, be arranged as three row four at the feed-in mouth at microwave dryer 21 top and arrange staggered being uniformly distributed, as shown in Figure 2, often capable layout two magnetrons 22, these two magnetrons 22 are preferably placed at same straight line, first row and the 3rd row are two magnetrons 22, these two magnetrons 22 are also located along the same line, second row and the 4th row are a magnetron 22, wherein two orthogonal settings of magnetron 22 of first row, the magnetron 22 of second row and the 4th row is positioned on the vertical line of the line of two magnetrons 22 of first row and the 4th row.In the present embodiment, centre-to-centre spacing often between row is 172.5mm, and the distance at the casing edge of the first row distance microwave dryer 21 is 172.5mm, centre-to-centre spacing often between row is preferably 160mm, the distance at the casing edge of first row distance microwave hothouse 21 is 160mm, for installing the microwave feed-in mouth 23 of this magnetron 22 for rectangular configuration, be preferably 40 × 80mm2.Adopt Ansoft HFSS software, 6 magnetrons 22 are carried out to the microwave field uniformity emulation of this arrangement, its microwave field plane and three-dimensional distribution map are as shown in Fig. 3 A, 3B, as seen from the figure, reflection through 6 magnetrons 22 superposes, Microwave Power Density in microwave dryer 21 is comparatively consistent, and microwave field distribution is even.
Also draft mechanism 6 can be set, described draft mechanism 6 comprises air-introduced machine 61 and air-inducing passage 62, described air-introduced machine 61 is arranged in described frame 1, be preferably mounted at the top of described frame 1, one end of described air-inducing passage 62 is communicated with described microwave dryer 21, and the other end of described air-inducing passage 62 is connected with described air-introduced machine 61.Cold wind heats through electric heating tube group 31, is divided into 2 groups and carries out control hot blast temperature, provides hot blast to microwave dryer 21, discharges the moisture evaporated in material dry run simultaneously.
Described heat energy drier 3 comprises power supply (not shown) and electric heating tube group 31, and described electric heating tube group 31 is connected with described power supply and is arranged in described frame 1 by a support 11, and described electric heating tube group 31 is arranged on the below of described material tray 4.The electric heating tube group 31 of the present embodiment is connected to form by 4 electric heating tubes, is arranged on the bottom part down of microwave dryer 21.
In the present embodiment, described first microwave power is 15 ~ 30W/g, and described second microwave power is 8 ~ 20W/g, and described 3rd microwave power is 5 ~ 15W/g.Described first baking temperature and described second baking temperature are for being less than or equal to 75 DEG C, and described 3rd baking temperature is for being less than or equal to 60 DEG C, and described 4th baking temperature is for being less than or equal to 45 DEG C.Described first vibration frequency is 35 ~ 50Hz, and described second vibration frequency is 30 ~ 45Hz, and described 3rd vibration frequency and described 4th vibration frequency are 25 ~ 40Hz.
See the agricultural product drying means flow chart that Fig. 4, Fig. 4 are one embodiment of the invention.Agricultural product drying means of the present invention, adopt the microwave energy of microwave drying mechanism 2 and the heat energy stage drying of heat energy drier 3, and adopt vibrating mechanism 5 to make material in dry run in homogeneous fluidization state, described microwave drying mechanism 2 arranges the first microwave power respectively, second microwave power and the 3rd microwave power, described heat energy drier 3 arranges the first baking temperature respectively, second baking temperature, 3rd baking temperature and the 4th baking temperature, the vibrating motor 52 of described vibrating mechanism 5 arranges the first vibration frequency respectively, second vibration frequency, 3rd vibration frequency and the 4th vibration frequency.
In the present embodiment, comprise the steps:
Pre-treatment step S1, chooses described material, cleans, removes the peel, stripping and slicing, carries out blanching or look is protected in immersion, is preferably cut into the bulk of 5 × 5mm ~ 14 × 14mm, is conducive to the follow-up drying processing of material;
Initial stage drying steps S2, the vibration frequency of described vibrating mechanism 5 is regulated to be described first vibration frequency, regulate the baking temperature of described heat energy drier 3 to be the first baking temperature, adopt the heated-air drying of higher temperature with the part free moisture removed in described material and reduce the moisture of material;
Mid-term drying steps S3, the vibration frequency of described vibrating mechanism 5 is regulated to be the second vibration frequency, the baking temperature of described heat energy drier 3 is regulated to be the second baking temperature, the microwave power regulating described microwave drying mechanism 2 is the first microwave power, adopts strong microwave drying to carry out internal batch moisture drying and removes the moisture moving to material surface;
Middle and later periods drying steps S4, the vibration frequency of described vibrating mechanism 5 is regulated to be the 3rd vibration frequency, the baking temperature of described heat energy drier 3 is regulated to be the 3rd baking temperature, the microwave power regulating described microwave drying mechanism 2 is the second microwave power, and in employing, microwave drying is carried out internal batch moisture drying and removes the moisture moving to material surface;
Later stage drying steps S5, the vibration frequency of described vibrating mechanism 5 is regulated to be the 4th vibration frequency, the baking temperature of described heat energy drier 3 is regulated to be the 4th baking temperature, regulate the microwave power of described microwave drying mechanism 2 to be the 3rd microwave power, adopt low microwave drying with remove described material residual moisture and prevent that the color and luster of dried product from changing, gelatinization and quality cracking.Dry moisture transfer point in described initial stage drying steps S2 is 60% ~ 70%, dry moisture transfer point in described mid-term drying steps S3 is 35% ~ 45%, dry moisture transfer point in described middle and later periods drying steps S4 is 15% ~ 25%, and the final moisture content of the described material in described later stage drying steps S5 is less than or equal to 8%.Wherein dry moisture transfer point can according to controlling drying time, detect the mass change of material at set intervals, calculate the moisture of material according to mass change, when reaching the moisture transfer point of each dryer section, adjustment drying parameter enters next drying stage.
Below for carrot raw material, carry out the further description of drying means of the present invention.By clean for carrot cleaning, grind off epidermis, remove the impurity such as earth, dead skin, little grass; Peel the defective products of carrot off, remove the foreign matters such as straw, metal, hair, again with water first clean silt and impurity; Carrot is cut into the bulk of 6 × 6mm, the carrot block cut is carried out blanching cooling, blanching temperature 95-100 DEG C, blanching time 8min, be thoroughly as the criterion to scald, but can not scald soft rotten, cool fast, and drain the surface moisture of diced carrot.Stage drying process is: (1) dry initial stage: setting vibration frequency 45 ~ 50Hz, preferred vibration frequency 45Hz, baking temperature 70 DEG C, opens 2 groups of electric heating tubes, processing time 30min, and moisture transfer point is 65.32%.(2) dry mid-term: setting vibration frequency 40 ~ 45Hz, baking temperature 70 DEG C, microwave power is 18W/g, and preferred vibration frequency 40Hz opens 1 group of electric heating tube, processing time 20min, and moisture transfer point is 42.53%.(3) the dry middle and later periods: setting vibration frequency 35 ~ 40Hz, baking temperature 50 DEG C, microwave power is 15W/g, preferred vibration frequency 40Hz, opens 1 group of electric heating tube, processing time 15min, and moisture transfer point is 16.41%.(4) the later stage of drying: setting vibration frequency 35 ~ 40Hz, baking temperature 40 DEG C, microwave power is 10W/g, preferred vibration frequency 35Hz, and processing time 7min is dry terminal.Dried dehydration carrot moisture is 7.2%, the moisture difference between daucus carrot particles within 1.4%, do not produce be charred, the defect such as variable color, the dried product qualification rate of the original color and luster of carrot, smell and flavour can be kept to reach 88.35%.
The present invention helps goods fluid by mechanical oscillation in dry run, vibrating motor 52 is adopted to drive material evenly to vibrate, the belt or the Plane Rotation mode that substitute employing at present change the two dimensional motion situation of material in microwave field, ensure that material is in fluidized state in microwave field, adopt heat energy and microwave energy two kinds of energy, according to the microwave fluidized drying characteristic of material, segmentation dry materials process, mate the vibration frequency of each dryer section, wind speed and microwave power, ensure that the synergy of flow field and microwave field is to the regulable control optimization of dry materials, reduce the loss of ineffective energy consumption, improve drying efficiency, and the heat energy that the material being in fluidized state is absorbed and microwave energy more even.Produce exciting force by vibrating motor 52 and make machine vibration, material jumps under the exciting force effect of assigned direction, obtain uniform fluidized state, phenomenon is worn with blowing without dead space, be conducive to boundary layer turbulence, heat and mass transfer enhancement, heat exchange is abundant, dry tenacity is high, thus reaches desirable drying effect.Simultaneously, adopt multiple microwave tube feed-in simultaneously microwave energy, each microwave source is input to microwave energy in hothouse by respective energy feed system, avoids the power density of hothouse feed-in mouth higher, analyzes the microwave field distribution of different configuration microwave tube, set up the threedimensional model of microwave field, the position of optimum choice microwave tube feed-in mouth, makes exciting field get incoherent polarised direction, microwave field reflection superposition, microwave source is intercoupled and reduces to minimum, improve the uniformity of microwave field.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (9)
1. an agricultural product drying device, comprise frame and be arranged on the microwave drying mechanism in described frame, heat energy drier and material tray, described material tray is arranged relative to described microwave drying mechanism and heat energy drier, it is characterized in that, also comprise for making the vibrating mechanism of material in homogeneous fluidization state in dry run, described vibrating mechanism involving vibrations frame, vibrating motor and elastomeric damper member, described vibration frame is arranged in described frame by described elastomeric damper member, described vibrating motor is connected with described vibration frame, described material tray is arranged on described vibration frame, described heat energy drier is arranged on below described material tray, described microwave drying mechanism corresponds respectively to the dry mid-term of described material, dry middle and later periods and the later stage of drying are provided with the first microwave power, second microwave power and the 3rd microwave power, described heat energy drier corresponds respectively to the dry initial stage of described material, dry mid-term, dry middle and later periods and the later stage of drying are provided with the first baking temperature, second baking temperature, 3rd baking temperature and the 4th baking temperature, described vibrating motor corresponds respectively to the dry initial stage of described material, dry mid-term, dry middle and later periods and the later stage of drying are provided with the first vibration frequency, second vibration frequency, 3rd vibration frequency and the 4th vibration frequency.
2. agricultural product drying device as claimed in claim 1, it is characterized in that, described microwave drying mechanism comprises microwave dryer, microwave source and is arranged on multiple magnetrons on described microwave dryer top, described multiple magnetron is connected with described microwave source respectively, and it is indoor that described material tray is arranged on described microwave drying.
3. agricultural product drying device as claimed in claim 2, it is characterized in that, also be provided with draft mechanism, described draft mechanism comprises air-introduced machine and air-inducing passage, described air-introduced machine is arranged on the top of described frame, one end of described air-inducing passage is communicated with described microwave dryer, and the other end of described air-inducing passage is connected with described air-introduced machine.
4. agricultural product drying device as claimed in claim 3, it is characterized in that, described heat energy drier comprises power supply and electric heating tube group, and described electric heating tube group is connected with described power supply and passes through a support installing in described frame, and described electric heating tube group is arranged on the below of described material tray.
5. the agricultural product drying device as described in claim 1,2,3 or 4, is characterized in that, described first microwave power is 15 ~ 30W/g, and described second microwave power is 8 ~ 20W/g, and described 3rd microwave power is 5 ~ 15W/g.
6. agricultural product drying device as claimed in claim 5, it is characterized in that, described first baking temperature and described second baking temperature are for being less than or equal to 75 DEG C, and described 3rd baking temperature is for being less than or equal to 60 DEG C, and described 4th baking temperature is for being less than or equal to 45 DEG C.
7. agricultural product drying device as claimed in claim 6, it is characterized in that, described first vibration frequency is 35 ~ 50Hz, and described second vibration frequency is 30 ~ 45Hz, and described 3rd vibration frequency and described 4th vibration frequency are 25 ~ 40Hz.
8. an agricultural product drying means, is characterized in that, adopts the microwave energy of microwave drying mechanism and the heat energy of heat energy drier to the dry initial stage of material, dry mid-term, dry middle and later periods and the later stage of drying stage drying, and adopt vibrating mechanism to make material in homogeneous fluidization state in dry run, described microwave drying mechanism corresponds respectively to the dry mid-term of described material, dry middle and later periods and the later stage of drying arrange the first microwave power, second microwave power and the 3rd microwave power, described heat energy drier corresponds respectively to the dry initial stage of described material, dry mid-term, dry middle and later periods and the later stage of drying arrange the first baking temperature, second baking temperature, 3rd baking temperature and the 4th baking temperature, the vibrating motor of described vibrating mechanism corresponds respectively to the dry initial stage of described material, dry mid-term, dry middle and later periods and the later stage of drying arrange the first vibration frequency, second vibration frequency, 3rd vibration frequency and the 4th vibration frequency, this agricultural product drying means, comprises the steps:
Pre-treatment step, chooses described material, cleans, removes the peel, stripping and slicing, carries out blanching or look is protected in immersion;
Initial stage drying steps, regulates the vibration frequency of described vibrating mechanism to be described first vibration frequency, regulates the baking temperature of described heat energy drier to be the first baking temperature, reduces the moisture of material with the part free moisture removed in described material;
Mid-term drying steps, the vibration frequency of described vibrating mechanism is regulated to be the second vibration frequency, the baking temperature of described heat energy drier is regulated to be the second baking temperature, regulate the microwave power of described microwave drying mechanism to be the first microwave power, carry out internal batch moisture drying and remove the moisture moving to material surface;
Middle and later periods drying steps, the vibration frequency of described vibrating mechanism is regulated to be the 3rd vibration frequency, the baking temperature of described heat energy drier is regulated to be the 3rd baking temperature, regulate the microwave power of described microwave drying mechanism to be the second microwave power, carry out internal batch moisture drying and remove the moisture moving to material surface;
Later stage drying steps, the vibration frequency of described vibrating mechanism is regulated to be the 4th vibration frequency, the baking temperature of described heat energy drier is regulated to be the 4th baking temperature, regulate the microwave power of described microwave drying mechanism to be the 3rd microwave power, with remove described material residual moisture and prevent that the color and luster of dried product from changing, gelatinization and quality cracking.
9. agricultural product drying means as claimed in claim 8, it is characterized in that, dry moisture transfer point in described initial stage drying steps is 60% ~ 70%, dry moisture transfer point in described mid-term drying steps is 35% ~ 45%, dry moisture transfer point in described middle and later periods drying steps is 15% ~ 25%, and the final moisture content of the described material in described later stage drying steps is less than or equal to 8%.
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| CN201503190U (en) * | 2009-09-16 | 2010-06-09 | 青岛成海工业装备有限公司 | Variable Frequency Constant Amplitude Vibration Fluidized Bed |
| JP2010175155A (en) * | 2009-01-30 | 2010-08-12 | Nobuaki Ikuta | Microwave oven including ventilation mechanism |
| CN102626135A (en) * | 2012-04-13 | 2012-08-08 | 江南大学 | Vacuum microwave vibration drying method with low energy consumption and low percent cracked rice for granular food-borne material |
| CN202501712U (en) * | 2012-02-10 | 2012-10-24 | 沈阳一通创业干燥设备有限公司 | Vibrated fluidized bed dryer |
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2012
- 2012-11-09 CN CN201210447018.7A patent/CN103808109B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2847184Y (en) * | 2005-12-23 | 2006-12-13 | 昆明理工大学 | Multiple point dispersion type microwave drying device |
| CN201266007Y (en) * | 2008-08-21 | 2009-07-01 | 温州大学 | Continuous microwave hot wind combined drying equipment |
| JP2010175155A (en) * | 2009-01-30 | 2010-08-12 | Nobuaki Ikuta | Microwave oven including ventilation mechanism |
| CN201503190U (en) * | 2009-09-16 | 2010-06-09 | 青岛成海工业装备有限公司 | Variable Frequency Constant Amplitude Vibration Fluidized Bed |
| CN202501712U (en) * | 2012-02-10 | 2012-10-24 | 沈阳一通创业干燥设备有限公司 | Vibrated fluidized bed dryer |
| CN102626135A (en) * | 2012-04-13 | 2012-08-08 | 江南大学 | Vacuum microwave vibration drying method with low energy consumption and low percent cracked rice for granular food-borne material |
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