CN115420066B - Double-layer vibration fluidization drying device based on array turbulence and drying method thereof - Google Patents
Double-layer vibration fluidization drying device based on array turbulence and drying method thereof Download PDFInfo
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- CN115420066B CN115420066B CN202210965513.0A CN202210965513A CN115420066B CN 115420066 B CN115420066 B CN 115420066B CN 202210965513 A CN202210965513 A CN 202210965513A CN 115420066 B CN115420066 B CN 115420066B
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- drying
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- 238000001035 drying Methods 0.000 title claims abstract description 137
- 238000005243 fluidization Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 41
- 238000005192 partition Methods 0.000 claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000010902 straw Substances 0.000 claims description 38
- 230000009471 action Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 8
- 241000213948 Astragalus sinicus Species 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 241001061264 Astragalus Species 0.000 description 3
- 235000010110 Astragalus glycyphyllos Nutrition 0.000 description 3
- 235000006533 astragalus Nutrition 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
- F26B3/0926—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by pneumatic means, e.g. spouted beds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a double-layer vibration fluidization drying device based on array turbulence and a drying method thereof, comprising a fluidized bed body, a porous baffle plate, an upper baffle plate and a middle baffle plate, wherein the fluidized bed body is provided with a feeding port, an air inlet, an air outlet, an upper discharge port and a lower discharge port, the porous baffle plate is used for dividing the fluidized bed body into an upper drying chamber and a lower drying chamber, the upper baffle plate is uniformly and obliquely arranged on the upper wall surface of the upper drying chamber and used for downwards pressing air flow, and the middle baffle plate is vertically and uniformly arranged on the porous baffle plate and is used for changing the air flow direction together with the upper baffle plate to form vortex; the mixed material enters an upper drying chamber from a feeding port, hot air flows through an air inlet and then respectively enters the upper drying chamber and a lower drying chamber in two strands, and the hot air flows are discharged from an air outlet after drying; the seeds fall off after the mixed materials are dried and pass through the porous partition plate to fall into the lower drying chamber for continuous drying, the dried seeds are discharged from the lower discharge opening of the lower drying chamber, and the rest materials are discharged from the upper discharge opening of the upper drying chamber. The invention can eliminate the adhesion effect caused by the tension of the liquid water surface and lead the seeds to be separated quickly.
Description
Technical Field
The invention relates to a fluidized drying device, in particular to a double-layer vibration fluidized drying device based on array turbulence and a drying method thereof.
Background
In agricultural production, when small seed crops such as milk vetch and the like are harvested by agricultural machinery, a large amount of finely crushed straw with high water content is mixed, the length of the straw is about 1cm and is not more than 2cm, the mass of wet straw is 70 times of that of milk vetch seeds, the seeds are difficult to fall off when adhered to the wet straw, and a remarkable liquid bridge phenomenon exists between the two. The seeds and the straws cannot be effectively separated by directly adopting a grading and cleaning machine, and the milk vetch seeds can be separated from the straws only after the straws are dried to lower moisture. The vibration fluidized bed is an efficient heating and drying mode, can remove the moisture on the surface of the material rapidly, and the related technology is mature, for example, an authorized publication number CN205678993U discloses a drying and screening fluidized bed. This kind of fluidized bed with screening function, including fluidized bed organism and drive arrangement, the fluidized bed organism in be equipped with heating stoving district and screening district, still include drive mechanism, heating stoving district be equipped with fluidization plate and hot air passage, fluidization plate locate hot air passage top, screening district be equipped with screen assembly, this screen assembly is connected with the fluidization plate, the fluidized bed organism be connected with drive arrangement through drive mechanism, drive arrangement drive mechanism realizes the swing to drive fluidized bed organism synchronous swing, and fluidization plate and screen assembly follow fluidized bed organism swing. However, in the above scheme, if the mixture of the newly harvested astragalus sinicus seeds and the straws is directly placed into the vibrating fluidized bed, it is difficult to directly and rapidly remove the moisture of the mixture, and the straws are required to be firstly reduced to a lower moisture content and then classified by cleaning, but the classification of the seeds is difficult to complete once due to the overlarge amount of the straws, and meanwhile, the separation moisture points of the seeds and the straws are difficult to grasp, so that unnecessary energy waste is easily caused.
Disclosure of Invention
The invention aims to: a first object of the present invention is to provide a double-layered vibration fluidized drying apparatus based on an array turbulence, which can eliminate an adhesion effect due to a surface tension of a liquid water and rapidly separate seeds.
The second object of the invention is to provide a drying method of a double-layer vibration fluidization drying device based on array turbulence.
The technical scheme is as follows: in order to achieve the above purpose, the invention discloses a double-layer vibration fluidization drying device based on array turbulence, which comprises a fluidized bed body provided with a feeding port, an air inlet, an air outlet, an upper discharge port and a lower discharge port, a porous baffle plate positioned in the inner cavity of the fluidized bed body and used for dividing the fluidized bed body into an upper drying chamber and a lower drying chamber, an upper baffle plate uniformly and obliquely arranged on the upper wall surface of the upper drying chamber and used for downwards pressing air flow, and a middle baffle plate vertically and uniformly arranged on the porous baffle plate and used for changing the air flow direction together with the upper baffle plate to form vortex; the mixed material enters the upper drying chamber from the feeding port, hot air flows through the air inlet and then respectively enters the upper drying chamber and the lower drying chamber in two strands, and the hot air flows are discharged from the air outlet after drying; the seeds fall off after the mixed materials are dried and pass through the porous partition plate to fall into the lower drying chamber for continuous drying, the dried seeds are discharged from the lower discharge opening of the lower drying chamber, and the rest materials are discharged from the upper discharge opening of the upper drying chamber.
Wherein the inclination angle of the upper baffle plate is 30-50 degrees, and the distance between the adjacent upper baffle plates is 20-40 cm.
Preferably, the included angle between the adjacent middle baffles along the width direction of the porous partition plate is 50-90 degrees, the minimum distance between the adjacent middle baffles along the width direction of the porous partition plate is 12-20 cm, and the minimum distance between the adjacent middle baffles along the length direction of the porous partition plate is 10-20 cm.
Furthermore, two rows of obliquely arranged lower baffles are uniformly distributed on the side wall surface of the lower drying chamber, wherein the upper end of the upper row of lower baffles is tightly attached to the porous partition plate, and the lower row of lower baffles is separated from the bottom wall of the lower drying chamber by a certain distance.
Further, the inclination angle of the lower baffles is 20-40 degrees, the distance between each row of adjacent lower baffles is 20-40 cm, and the distance between the upper row of lower baffles and the lower row of lower baffles is 7-10 cm.
Preferably, the distance between the lower edge of the next row of lower baffles and the bottom wall of the lower drying chamber is 3 cm-6 cm.
Furthermore, the fluidized bed body is provided with a bed body with a cube-shaped structure, and the outer side wall of the bed body is provided with a vibrating motor.
Wherein, the feeding port is provided with a gas locking feeder.
Further, still include base and symmetry setting and be used for setting up the support that stands of the fluidized bed body on the base, the outer wall symmetry of the fluidized bed body be provided with stand the L type connecting plate of support one-to-one, the lower fixed surface of L type connecting plate is provided with the rubber post, stand the fixed surface of support and be provided with down the rubber post, go up the rubber post and cover down on the rubber post and be equipped with the spring, and the upper end butt of spring is at the lower surface of L type connecting plate, the lower extreme butt of spring is at the upper surface of stand.
The invention relates to a drying method of a double-layer vibration fluidization drying device based on array turbulence, which comprises the steps that a high-humidity mixed material with seeds enters an upper drying chamber in a fluidized bed body from a feeding port, the mixed material is in a scattered fluidization state under the action of vibration, hot air flows enter an inner cavity of the fluidized bed body through an air inlet and are split into two flows, one hot air flow enters the upper drying chamber, and the other hot air flow enters a lower drying chamber; the hot air flow entering the upper drying chamber heats the mixed material, so that seeds fall off independently and pass through the porous partition plate to enter the lower drying chamber; the hot air flow entering the lower drying chamber continuously dries the seeds falling from the upper drying chamber, the dried residual materials are discharged from the upper discharge opening of the upper drying chamber, the dried seeds are discharged from the lower discharge opening of the lower drying chamber, the hot air flow is discharged from the air outlet, the temperature and humidity of the hot air flow discharged from the air outlet are measured, and the total amount of the hot air flow recovered and reintroduced into the air inlet after being discharged is calculated according to the temperature and humidity of the hot air flow discharged from the air outlet and the temperature and humidity of the required hot air flow.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable advantages:
(1) The upper baffle plate presses the hot air downwards, so that the hot air flows to the middle baffle plate area to be converged, and the mutual contact between the hot air and the mixed material is enhanced; the mixed material is fully contacted with the air flow pressed by the upper baffle plate and disturbed by the middle baffle plate, and is fully contacted and collided with the middle baffle plate, the hot air flow forms disordered vortex under the combined action of the upper baffle plate and the middle baffle plate, the heat and mass transfer between the air flow and wet straw and between the air flow and seeds are enhanced, the relative speed and time of the hot air flow in contact with the mixed material are increased, the moisture on the surface of the mixed material is quickly removed, the adhesion effect formed between the seeds and the straw due to the surface tension of liquid water is eliminated, the seeds and the straw are separated, and meanwhile, the purpose of increasing the separation of the seeds and the straw is achieved by the full collision of the mixed material and the middle baffle plate;
(2) According to the invention, after the seeds enter the lower drying chamber, the seeds bounce up and down under the action of the lower baffle plate and are close to the bottom wall of the lower drying chamber, the air flow is converged towards the bottom wall area under the action of the lower baffle plate, vortex flow is formed, heat and mass transfer between the hot air flow and seeds is enhanced, the contact time and relative speed of the seeds and the hot air flow are enhanced, so that the moisture in the seeds is removed as much as possible, and the drying pressure and drying cost of the subsequent procedures are reduced.
(3) Compared with the traditional single-layer vibration fluidized bed drying, the method does not need to reduce the moisture content of the straw to be lower and then clean and classify the straw, so that the operation procedure is simplified, and unnecessary energy loss caused by overlarge reduction of the moisture content of the straw is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is an enlarged view of a portion of the spring mounting of the present invention;
FIG. 4 is a cross-sectional view of a fluidized bed in accordance with the present invention;
FIG. 5 is a schematic view showing the distribution of baffles in a porous separator according to the present invention;
FIG. 6 is a schematic side sectional view of a fluidized bed in accordance with the present invention;
FIG. 7 is a schematic view showing the upper part of the fluidized bed in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size of parts and relative sizes may be exaggerated for clarity. Like numbers refer to like elements throughout.
As shown in fig. 1 and 2, the double-layer vibration fluidization drying device based on array turbulence of the invention comprises a fluidized bed body 1, a porous baffle plate 2, an upper baffle plate 3, a middle baffle plate 4, a lower baffle plate 5, a vibration motor 6, a gas locking feeder 7, a base 8, a vertical support 9, an L-shaped connecting plate 10, an upper rubber column 11, a lower rubber column 12 and a spring 13. The fluidized bed body 1 is provided with a bed body with a cube-shaped structure, the fluidized bed body 1 is provided with a feeding port 101, an air inlet 102, an air outlet 103, an upper discharge port 104 and a lower discharge port 105, wherein the porous partition plate 2 is positioned in the inner cavity of the fluidized bed body and divides the fluidized bed body into an upper drying chamber and a lower drying chamber, the feeding port 101 is positioned at the upper part of the upper drying chamber, the upper discharge port 104 is positioned at the lower part of the upper drying chamber, the lower discharge port 105 is positioned at the lower part of the lower drying chamber, and the air inlet 102 and the air outlet 103 are respectively positioned at two ends of the fluidized bed body 1; wherein the mixed material enters the upper drying chamber from the feeding port 101, the hot air flow enters the upper drying chamber and the lower drying chamber respectively in two strands after passing through the air inlet 102, and the hot air flow is discharged from the air outlet 103 after drying; the dried seeds fall off and pass through the porous partition plate 2 to fall into the lower drying chamber for continuous drying, the dried seeds are discharged from the lower discharge opening 105 of the lower drying chamber, and the rest materials are discharged from the upper discharge opening 104 of the upper drying chamber. As shown in fig. 3, 4L-shaped connecting plates 10 are symmetrically arranged on the outer wall of the fluidized bed body 1, 4 vertical supports 9 are symmetrically arranged on the base 8, the middle supports 9 and the L-shaped connecting plates 10 are arranged in one-to-one correspondence, an upper rubber column 11 is fixedly arranged on the lower surface of each L-shaped connecting plate 10, a lower rubber column 12 is fixedly arranged on the upper surface of each vertical support 9, springs 13 are sleeved on the upper rubber column 11 and the lower rubber column 12, the upper ends of the springs 13 are abutted to the lower surface of each L-shaped connecting plate 10, and the lower ends of the springs 8 are abutted to the upper surface of each vertical support 9. The fluidized bed body 1 is obliquely arranged on the vertical support 9. The air locking feeder 7 is arranged at the feeding port of the fluidized bed body 1, the air locking feeder 7 is an existing air locking feeder on the market, and the vibrating motor is arranged on the outer side wall of the fluidized bed body 1. The pore diameter of the porous partition plate 2 is set according to the grain size, and the pore diameter of the porous partition plate 2 is required to be slightly larger than the maximum size of the grains. The porous partition board 2 is used for separating the upper drying chamber and the lower drying chamber, and the porous partition board 2 extends towards the air inlet to form a flow dividing plate for dividing the hot air flow into two flows which respectively enter the upper drying chamber and the lower drying chamber. The seeds in the invention are small seeds of crops.
As shown in fig. 4, the upper baffle plates 3 are obliquely arranged on the upper wall surface of the upper drying chamber, and the upper baffle plates 3 are distributed at equal intervals, the upper baffle plates 3 have an inclination angle of 30 ° to 50 °, the ventilation effect is affected and congestion is easily caused when the inclination angle is more than 50 °, and the expected air flow compression effect is difficult to form when the inclination angle is less than 30 °. The adjacent upper baffles 3 are arranged in parallel, the distance between the adjacent upper baffles 3 is 20 cm-40 cm, and the operation effect is influenced by excessive dense and rare conditions. As shown in fig. 5, the middle baffle plates 4 are vertically arranged on the porous partition plate 2, and the middle baffle plates are uniformly distributed along the width direction and the length direction of the porous partition plate 2 respectively, wherein an included angle between every two adjacent middle baffle plates 4 along the width direction of the porous partition plate is 50-90 degrees, when the included angle is smaller than 50 degrees, the air flow passes through the porous partition plate at too high speed, enough vortex cannot be formed, and meanwhile, the collision probability between seeds and the middle baffle plates can be reduced; when the included angle is larger than 90 degrees, the material is easy to be jammed. The minimum distance x between the adjacent middle baffles 4 along the width direction of the porous partition plate is 12 cm-20 cm, congestion is easy to occur when the minimum distance x is smaller than 12cm, and the formed vortex density is too small when the minimum distance x is larger than 20cm, so that the operation effect is affected. The minimum distance y between the adjacent middle baffles 4 along the length direction of the porous partition plate is 10 cm-20 cm, and the material is easy to be jammed due to the fact that the minimum distance y is smaller than 10 cm; the minimum distance y is larger than 20cm, so that the arrangement density of the baffles and the formation density in the nest are influenced, the drying and collision effects are influenced, and the separation effect of the straw and the seeds is influenced. As shown in fig. 6 and 7, the hot air flow entering the upper drying chamber is pressed downwards through the upper baffle plate 3, so that the hot air flows to the area of the middle baffle plate 4 are converged, and the mutual contact between the hot air flow and the mixed material is enhanced; meanwhile, under the action of a vibration motor, the mixed material of the high-humidity straw and the seeds bounces up and down on the porous partition plate 2 and is in a scattered fluidization state, the mixed material is fully contacted with the middle baffle plate while being fully contacted with the air flow pressed by the upper baffle plate and disturbed by the middle baffle plate array, the hot air flow forms disordered vortex under the combined action of the upper baffle plate and the middle baffle plate, the heat and mass transfer between the hot air flow and the straw and the seeds are enhanced, the relative speed and the time when the hot air flow is contacted with the mixed material are increased, the surface moisture of the mixed material is quickly removed, the adhesion effect formed between the seeds and the straw due to the surface tension of liquid water is eliminated, the seeds and the straw are separated, and meanwhile, the full collision between the mixed material and the middle baffle plate also plays the role of aggravating the separation of the seeds and the straw. The two rows of lower baffles 5 are uniformly distributed on the side wall surface of the lower drying chamber, a certain angle is formed between the lower baffles 5 and the porous partition plate, wherein the upper end of the upper row of lower baffles 5 is tightly attached to the porous partition plate 2, and the lower row of lower baffles 5 is separated from the bottom wall of the lower drying chamber by a certain distance. The inclination angle of the lower baffle plate 5 and the porous baffle plate is 20-40 degrees, when the inclination angle is larger than 40 degrees, the ventilation effect is influenced, the congestion is easy to occur, and when the inclination angle is smaller than 20 degrees, the turbulence effect of the lower baffle plate is influenced. The adjacent lower baffles are arranged in parallel, the distance between each row of adjacent lower baffles 5 is 20 cm-40 cm, the distance between the upper-gear wind baffle and the lower-gear wind baffle is 7 cm-10 cm, and the operation effect is influenced by excessive dense and rare wind baffles. As shown in fig. 6 and 7, the distance between the next row of lower baffles 5 and the bottom wall of the lower drying chamber is 3 cm-6 cm, and materials are easy to be jammed when the distance is less than 3cm, and the number of bottom vortex and the airflow speed are reduced when the distance is more than 6cm, so that the expected drying effect cannot be achieved. After the seeds enter the lower drying chamber, the seeds bounce up and down under the action of the lower baffle plate to be close to the vicinity of the bottom wall of the lower drying chamber, the air flow converges towards the bottom wall area under the action of the lower baffle plate and forms vortex, the heat and mass transfer between the hot air flow and the seeds are enhanced, the contact time and the relative speed of the seeds and the hot air flow are enhanced, so that the water in the seeds is removed as much as possible, and the drying pressure and the drying cost of the subsequent procedures are reduced. Compared with the traditional single-layer vibration fluidized bed drying, the method does not need to reduce the moisture content of the straw to be lower and then clean and classify the straw, so that the operation procedure is simplified, and unnecessary energy loss caused by overlarge reduction of the moisture content of the straw is reduced. The seeds exiting the dryer are then dried by the remaining drying means for their material characteristics, if necessary, by determining whether further drying is required based on the difference between their moisture content and the stored moisture. The drying process of the invention mainly comprises heat and mass transfer between the hot air flow and wet straw and between the hot air flow and seed grains, and the heat and mass transfer between the wet straw and seeds is too little to be ignored.
The invention relates to a drying method of a double-layer vibration fluidization drying device based on array turbulence, which comprises the steps that high-humidity mixed materials combined by astragalus sinicus seeds and high-humidity straws enter an upper drying chamber in a fluidized bed body from a gas locking feeder of a feeding port, the mixed materials are in a scattered fluidization state under the action of a vibration motor, most of the astragalus sinicus seeds still adhere to the high-humidity straws at the moment, hot air flows into the inner cavity of the fluidized bed body from an air inlet through a hose after passing through an external heating device and a blower, and are split into two flows through a porous partition plate, one flow of hot air flows into the upper drying chamber, and the other flow of hot air flows into a lower drying chamber; the hot air flow entering the upper drying chamber heats and dries the mixed material of the astragalus sinicus seeds and the high-humidity straws, so that the moisture on the surface layers of the straws and the seeds is removed rapidly, the phenomenon of liquid bridge between the seeds and the straws caused by the surface tension of the surface layer liquid water is eliminated, and the seeds are smoothly fallen off from the surfaces of the straws and are transmitted to the porous partition boards to enter the lower drying chamber; the hot air flow entering the lower drying chamber continues to dry the seeds falling from the upper drying chamber until the seeds are discharged from the lower discharge opening. The upper baffle plate and the middle baffle plate positioned in the upper drying chamber block and disturb the hot air flowing through the nearby hot air flow and the mixed material in a scattered fluidization state, so that the hot air changes the flowing direction and the turbulence and vortex are enhanced at the accessories of the baffle plate, the upper baffle plate also plays a role in pressing the hot air downwards, the relative movement speed and the contact time of the hot air and the high-humidity materials are increased, and the moisture on the surface layers of wet straws and seeds is removed rapidly. The double-layer lower baffle plate positioned in the lower drying chamber presses the hot air flow entering the lower drying chamber downwards, so that the air speed near the bottom is higher than that of other areas, and the heat and mass transfer between the seeds and the hot air flow are increased through blocking the seeds and the hot air flow, so that the seed drying is accelerated. The dried straw is discharged from the dryer through the discharge opening 6 of the upper drying chamber, the dried seeds are discharged from the dryer through the discharge opening 7, and the hot air flow is discharged from the dryer through the air outlet. And the hot air flow is discharged from the air outlet, the temperature and the humidity of the hot air flow discharged from the air outlet are measured, and the total amount of the hot air flow recovered and reintroduced into the air inlet after being discharged is calculated according to the temperature and the humidity of the hot air flow discharged from the air outlet and the temperature and the humidity of the required hot air flow.
Claims (10)
1. Double-deck vibration fluidization drying device based on array vortex, its characterized in that: the device comprises a fluidized bed body (1) with a feeding port (101), an air inlet (102), an air outlet (103), an upper discharge port (104) and a lower discharge port (105), a porous baffle plate (2) which is positioned in the inner cavity of the fluidized bed body and divides the fluidized bed body into an upper drying chamber and a lower drying chamber, an upper baffle plate (3) which is uniformly and obliquely arranged on the upper wall surface of the upper drying chamber and is used for downwards pressing airflow, and a middle baffle plate (4) which is vertically and uniformly arranged on the porous baffle plate and is used for changing the airflow direction together with the upper baffle plate to form vortex, wherein the included angle between the adjacent middle baffle plates (4) along the width direction of the porous baffle plate is 50-90 degrees; the mixed material enters an upper drying chamber from a feeding port (101), hot air flows into the upper drying chamber and a lower drying chamber respectively in two flows after passing through an air inlet (102) positioned at the right end of the fluidized bed body (1), and the hot air flows after drying are discharged from an air outlet (103) positioned at the left end of the fluidized bed body (1); the seeds fall off after the mixed materials are dried and pass through the porous partition plate (2) to fall into the lower drying chamber for continuous drying, the dried seeds are discharged from the lower discharge opening (105) of the lower drying chamber, the rest materials are discharged from the upper discharge opening (104) of the upper drying chamber, and the mixed materials comprise wet straws adhered with the seeds.
2. The double-layer vibration fluidization drying device based on array turbulence as set forth in claim 1, wherein: the inclination angle of the upper baffles (3) is 30-50 degrees, and the distance between the adjacent upper baffles (3) is 20-40 cm.
3. The double-layer vibration fluidization drying device based on array turbulence as set forth in claim 1, wherein: the minimum distance between the adjacent middle baffle plates (4) along the width direction of the porous partition plate is 12 cm-20 cm, and the minimum distance between the adjacent middle baffle plates (4) along the length direction of the porous partition plate is 10 cm-20 cm.
4. The double-layer vibration fluidization drying device based on array turbulence as set forth in claim 1, wherein: two rows of lower baffles (5) are uniformly distributed on the side wall surface of the lower drying chamber, wherein the upper end of the upper row of lower baffles (5) is tightly attached to the porous partition plate (2), and the lower row of lower baffles (5) is separated from the bottom wall of the lower drying chamber by a certain distance.
5. The double-deck vibration fluidized drying device based on array turbulence according to claim 4, wherein: the inclination angle of the lower baffles (5) is 20-40 degrees, the distance between each row of adjacent lower baffles (5) is 20-40 cm, and the distance between the upper row of lower baffles and the lower row of lower baffles is 7-10 cm.
6. The double-deck vibration fluidized drying device based on array turbulence according to claim 4, wherein: the distance between the lower edge of the next row of lower baffle plates (5) and the bottom wall of the lower drying chamber is 3 cm-6 cm.
7. The double-layer vibration fluidization drying device based on array turbulence as set forth in claim 1, wherein: the fluidized bed body (1) is provided with a bed body with a cube-shaped structure, and a vibrating motor (6) is arranged on the outer side wall of the bed body.
8. The double-layer vibration fluidization drying device based on array turbulence as set forth in claim 1, wherein: the feeding port (101) is provided with an air locking feeder (7).
9. The double-layer vibration fluidization drying device based on array turbulence as set forth in claim 1, wherein: still include base (8) and symmetry setting just are used for setting up upright support (9) of the fluidized bed body on the base, the outer wall symmetry of the fluidized bed body (1) is provided with L type connecting plate (10) with upright support one-to-one, and the lower fixed surface of L type connecting plate (10) is provided with rubber post (11), and the last fixed surface of upright support (9) is provided with down rubber post (12), and the cover is equipped with spring (13) on last rubber post (11) and lower rubber post (12), and the upper end butt of spring (13) is at the lower surface of L type connecting plate (10), and the lower extreme butt of spring (13) is at the upper surface of upright support (9).
10. A method of drying an array turbulence based double-deck vibratory fluidized drying apparatus according to claim 1, wherein: the high-humidity mixed material with seeds enters an upper drying chamber in the fluidized bed body from a feeding port, the mixed material is in a scattered fluidization state under the action of vibration, hot air flows into the inner cavity of the fluidized bed body through an air inlet and is split into two streams, one stream of hot air flows into the upper drying chamber, and the other stream of hot air flows into a lower drying chamber; the hot air flow entering the upper drying chamber heats the mixed material, so that seeds fall off independently and pass through the porous partition plate to enter the lower drying chamber; the hot air flow entering the lower drying chamber continuously dries the seeds falling from the upper drying chamber, the dried residual materials are discharged from the upper discharge opening of the upper drying chamber, the dried seeds are discharged from the lower discharge opening of the lower drying chamber, the hot air flow is discharged from the air outlet, the temperature and humidity of the hot air flow discharged from the air outlet are measured, and the total amount of the hot air flow recovered and reintroduced into the air inlet after being discharged is calculated according to the temperature and humidity of the hot air flow discharged from the air outlet and the temperature and humidity of the required hot air flow.
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