CN114593577B

CN114593577B - Mixed-flow type movable grain dryer

Info

Publication number: CN114593577B
Application number: CN202210398668.0A
Authority: CN
Inventors: 张勇
Original assignee: Yangzhou Zeyang Machinery Co ltd
Current assignee: Yangzhou Zeyang Machinery Equipment Co ltd
Priority date: 2022-04-16
Filing date: 2022-04-16
Publication date: 2022-12-20
Anticipated expiration: 2042-04-16
Also published as: CN114593577A

Abstract

The invention discloses a mixed flow type movable grain dryer, which comprises: perpendicular lifting machine, the drying-machine casing is installed on perpendicular lifting machine's right side, and installs steam on perpendicular lifting machine's the lateral wall and produce the structure, and the stoving feed inlet department of drying-machine casing communicates with perpendicular lifting machine's discharging pipe simultaneously, and one-level stoving structure is installed to the inside upside of drying-machine casing, and the downside of one-level stoving structure installs second grade stoving structure, and the blast pipe is installed to the upper right side of drying-machine casing simultaneously to blast pipe and external sack cleaner import intercommunication set up. This portable grain drying-machine of mixed flow type, upside stoving structure rely on agitating unit's mechanical force, corn grain's gravity, hot-air to corn grain's buoyancy and the interaction force of hot-air between to the grain, make constantly mix between hot-air and the corn grain, carry out heat transfer to take away the moisture in the grain granule, thereby reach the purpose of dry precipitation.

Description

Mixed-flow type movable grain dryer

Technical Field

The invention relates to the field of grain drying, in particular to a mixed flow type movable grain dryer.

Background

The food drying machine is also called as a grain drying machine, the existing grain drying machine adopting a batch type circulating structure is divided into a cross flow type and a mixed flow type, and the batch type circulating grain drying machine: the method is characterized in that grain grains are loaded into a drying machine, circularly dried in the drying machine, discharged after reaching set moisture, and cross flow is carried out: the drying equipment is defined by hot air flowing in the transverse direction, generally adopts a screen structure to separate grains from an air flow channel, and the mixed flow is as follows: the drying equipment defined by irregularly mixing hot air and grains generally adopts a horn-shaped tube structure to guide air flow to enter and exit, the cross flow type drying equipment is stable in performance and high in mixed flow type drying speed, when the corn particles are dried, the mixed flow type drying equipment has the defect of easy grain erection (blockage), the phenomenon of uneven drying is caused, and the popularization is limited.

Disclosure of Invention

The invention provides a mixed flow type movable grain dryer in order to make up for the market vacancy.

The invention aims to provide a mixed flow type movable grain dryer to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a mixed-flow type mobile grain dryer comprising:

the drying machine comprises a vertical lifting machine, wherein a dryer shell is installed on the right side of the vertical lifting machine, a hot gas generating structure is installed on the side wall of the vertical lifting machine, a drying feed inlet of the dryer shell is communicated with a discharge pipe of the vertical lifting machine, a primary drying structure is installed on the upper side inside the dryer shell, a secondary drying structure is installed on the lower side of the primary drying structure, an exhaust pipe is installed on the upper right side of the dryer shell, and the exhaust pipe is communicated with an inlet of an external bag-type dust collector;

the primary drying structure is composed of an upper side drying structure and a lower side drying structure, the upper side drying structure and the lower side drying structure are consistent in structure, an inner cavity is formed inside a containing flow channel on the upper side drying structure, a rotating shaft is movably arranged inside the containing flow channel, the end part of the rotating shaft is fixedly connected with an output shaft of a driving motor, multiple groups of stirring blades are uniformly arranged on the surface of the rotating shaft, and multiple groups of hot air holes are uniformly formed in the surface of the inner wall of the containing flow channel;

second grade stoving structure, the discharge gate intercommunication setting on the slope pipe upper end of second grade stoving structure and the downside stoving structure, and the bottom and the fixed setting in normal distribution case upper end of slope pipe, the multiunit of evenly installing simultaneously of the inside of normal distribution case blocks the post to the even activity in inside of normal distribution case is provided with six groups and changes the roller, and the multiunit runner pipe is evenly installed to the bottom of normal distribution case, and the runner pipe setting is in the inside in bagging-off region.

Furthermore, the hot gas generating structure comprises an installation frame, a blower, a heating device, a header pipe, an upper branch pipe and a lower branch pipe, the installation frame is installed on the side wall of the vertical elevator, the blower and the heating device are installed inside the installation frame respectively, and the air outlet end of the blower is communicated with the header pipe through the heating device.

Furthermore, the end part of the main pipe is arranged in an inner cavity of the upper side drying structure, the bottom of the main pipe is respectively provided with an upper branch pipe and a lower branch pipe, the end part of the upper branch pipe is arranged in the inner cavity of the lower side drying structure, and the end part of the lower branch pipe is communicated with a hot air cavity arranged on the inner wall of the normal distribution box.

Further, upside stoving structure is including holding runner, inner chamber, speed reduction plate, stirring leaf, pivot, discharge gate and steam hole, and is the stairstepping setting between upside stoving structure and the downside stoving structure.

Furthermore, the section that holds the runner is "C" shape setting, and holds the inside both sides of runner and evenly install the multiunit air brake, and the air brake is "V" shape structure of being made by the metal material simultaneously, and the outside surface of air brake evenly installs the multiunit and stands up the piece, and sets up for alternately between multiunit air brake and the multiunit stirring leaf.

Further, second grade stoving structure includes that chamber, picture peg, runner pipe, bagging-off region, sprocket, chain and steam chamber are placed to gas vent, pipe, normal distribution case, block post, commentaries on classics roller, baffle, maize, and the section of normal distribution case is isosceles trapezoid setting.

Furthermore, the inside post that blocks of normal distribution incasement portion is cavity setting, and blocks the outside surface of post and evenly seted up the multiunit gas vent, blocks the hot air cavity intercommunication of seting up on the inside of post and the normal distribution incasement wall simultaneously to interval between the adjacent two sets of posts that block is greater than the size of maize granule.

Furthermore, the roller is movably arranged in the normal distribution box, chain wheels are mounted at the end portions of the shafts on the six groups of rollers, the chain wheels and the chain wheels are driven by chains, the rotation directions of the six groups of rollers are consistent, the six groups of rollers are arranged in the middle of the normal distribution box, and the rollers are driven by motors.

Further, multiunit baffle is evenly installed to the bottom of normal distribution case, and forms the maize between adjacent two sets of baffles and place the chamber, and the maize is placed and is kept apart through the picture peg between chamber and the runner pipe simultaneously, installs the handle on the picture peg, and the picture peg is detachable construction.

Furthermore, the primary drying structure and the secondary drying structure are combined together in a layered mode to form the drying device for the corn particles, and two sides of the secondary drying structure are installed on the inner side wall of the shell of the drying machine through the support.

Compared with the prior art, the invention has the beneficial effects that:

1. the rotating shaft is driven by the motor to rotate, a plurality of groups of stirring blades on the rotating shaft stir the corns and turn the corns, and meanwhile, hot air is sprayed out from the hot air holes to dry the corn particles in the turning process, so that the corn drying work is improved;

2. the upper side drying structure continuously mixes the hot air and the corn particles by depending on the mechanical force of the stirring device, the gravity of the corn particles, the buoyancy of the hot air to the corn particles and the interaction force of the hot air to the grain particles, so as to carry out heat transfer and take away the moisture in the grain particles, thereby achieving the purpose of drying and dewatering;

3. the arrangement of the speed reducing plate enables corn particles to impact on the speed reducing plate, so that the retention time of the corn particles on the accommodating flow channel is prolonged, the drying effect of the corn particles is improved, and meanwhile, a plurality of groups of turning-over blocks are uniformly arranged on the outer side surface of the speed reducing plate, so that the corn particles impact on the turning-over blocks, the running state of the corn particles is changed, and the drying effect of the corn particles is improved;

4. when the corn particles impact on the barrier columns, the corn particles move into the air, so that the circumferential positions of the surfaces of the corn particles are all contacted with hot air, and the surfaces of the corn particles are uniformly dried; the interval between two adjacent sets of blocking posts is greater than the size of maize granule for when the maize granule shuttles back and forth between two adjacent sets of blocking posts, can not block in the inside of normal distribution case, six groups of commentaries on classics rollers are synchronous, the syntropy rotates simultaneously, drive the maize granule and remove, further avoid the maize granule card in the inside of normal distribution case.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic view of an upper drying configuration of the present invention;

FIG. 3 is a top view of FIG. 2 of the structure of the present invention;

FIG. 4 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 1;

FIG. 5 is a schematic view of a containment duct constructed in accordance with the present invention;

FIG. 6 is a schematic diagram of a normal distribution box according to the present invention;

FIG. 7 is a schematic cross-sectional view of a flow-through tube constructed in accordance with the present invention;

FIG. 8 is a schematic cross-sectional view of a barrier pillar of the structure of the present invention;

FIG. 9 is a schematic cross-sectional view taken along line C-C in FIG. 1 in accordance with the present invention;

FIG. 10 is a schematic cross-sectional view taken along line B-B of FIG. 6 according to the present invention.

In the figure: 1. a vertical hoist; 2. a hot gas generating structure; 21. installing a frame; 22. a blower; 23. a heating device; 24. a header pipe; 25. an upper branch pipe; 26. a lower branch pipe; 3. a dryer housing; 4. a primary drying structure; 41. an upper side drying structure; 411. an accommodating flow passage; 412. an inner cavity; 413. a speed reduction plate; 414. stirring blades; 415. a rotating shaft; 416. a discharge port; 417. hot air vents; 42. a lower side drying structure; 5. a secondary drying structure; 50. an exhaust port; 51. an inclined tube; 52. a normal distribution box; 53. a blocking post; 54. rotating the roller; 55. a baffle plate; 56. a corn placing cavity; 57. inserting plates; 58. a flow-through tube; 59. a bagging area; 60. a sprocket; 61. a chain; 62. a hot air chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The first specific implementation way is as follows: referring to fig. 1-10, the present invention provides a technical solution: a mixed-flow type mobile grain dryer comprising: the device comprises a vertical elevator 1, a primary drying structure 4 and a secondary drying structure 5;

a dryer shell 3 is installed on the right side of the vertical elevator 1, a hot air generating structure 2 is installed on the side wall of the vertical elevator 1, meanwhile, a drying feed inlet of the dryer shell 3 is communicated with a discharge pipe of the vertical elevator 1, a primary drying structure 4 is installed on the upper side inside the dryer shell 3, a secondary drying structure 5 is installed on the lower side of the primary drying structure 4, an exhaust pipe is installed on the upper right side of the dryer shell 3, and the exhaust pipe is communicated with an external bag-type dust collector inlet;

the primary drying structure 4 is composed of an upper drying structure 41 and a lower drying structure 42, the upper drying structure 41 and the lower drying structure 42 are identical in structure, an inner cavity 412 is formed inside a containing flow passage 411 on the upper drying structure 41, a rotating shaft 415 is movably arranged inside the containing flow passage 411, the end portion of the rotating shaft 415 is fixedly connected with an output shaft of a driving motor, multiple groups of stirring blades 414 are uniformly arranged on the surface of the rotating shaft 415, and multiple groups of hot air holes 417 are uniformly formed in the surface of the inner wall of the containing flow passage 411;

the upper end of the inclined pipe 51 of the secondary drying structure 5 is communicated with the discharge hole 416 on the lower side drying structure 42, the bottom of the inclined pipe 51 is fixedly arranged at the upper end of the normal distribution box 52, meanwhile, a plurality of groups of blocking columns 53 are uniformly arranged in the normal distribution box 52, six groups of rotating rollers 54 are uniformly and movably arranged in the normal distribution box 52, a plurality of groups of circulating pipes 58 are uniformly arranged at the bottom of the normal distribution box 52, and the circulating pipes 58 are arranged in the bagging area 59.

The staff uses the instrument to arrange the maize granule in vertical lift 1's inside, and add the inside of upside stoving structure 41 through vertical lift 1, moist maize granule rolls on upside stoving structure 41, upside stoving structure 41 is the slope setting with downside stoving structure 42, be convenient for the maize roll above that, and carry out primary drying work through upside stoving structure 41 and downside stoving structure 42, after one-level stoving structure 4 finishes drying, and enter into the inside of normal distribution case 52, carry out secondary drying work through normal distribution case 52, the maize that finishes drying collects the inside at the wrapping bag from flow tube 58, collect work, setting through one-level stoving structure 4 and second grade stoving structure 5, can carry out even drying work to the maize granule.

As shown in fig. 1: the bottom of device is installed and is removed the wheel, through the setting that removes the wheel, is convenient for remove this drying device, when removing this device to the target location, can use hard thing such as stone, will remove the wheel and fix, avoids the device to take place the activity when carrying out the operation of drying.

The second embodiment is as follows: the present embodiment is further limited to the first embodiment, the hot air generating structure 2 includes a mounting frame 21, a blower 22, a heating device 23, a header pipe 24, an upper support pipe 25 and a lower support pipe 26, the mounting frame 21 is mounted on a side wall of the vertical hoisting machine 1, the blower 22 and the heating device 23 are respectively mounted inside the mounting frame 21, and an air outlet end of the blower 22 is communicated with the header pipe 24 through the heating device 23.

As shown in fig. 1: the hot gas generating structure 2 operates in the following manner: the blower 22 starts to operate, the generated hot air enters the interior of the header pipe 24 under the heating operation of the heating device 23, and sequentially enters the interiors of the upper branch pipe 25 and the lower branch pipe 26, and the hot air sequentially enters the interiors of the upper drying structure 41, the lower drying structure 42 and the normal distribution box 52 to dry the corns thereon.

The third concrete implementation mode: in this embodiment, which is a further limitation of the second embodiment, the end of the main pipe 24 is installed in the inner cavity 412 of the upper drying structure 41, the bottom of the main pipe 24 is respectively installed with the upper branch pipe 25 and the lower branch pipe 26, the end of the upper branch pipe 25 is installed in the inner cavity 412 of the lower drying structure 42, and the end of the lower branch pipe 26 is communicated with the hot air cavity 62 opened on the inner wall of the normal distribution box 52.

As shown in fig. 1: during hot gas enters into the inside inner chamber 412 of upside drying structure 41 from house steward 24, hot gas also can enter into the inside inner chamber 412 of downside drying structure 42 through last branch pipe 25, and the maize granule removes on upside drying structure 41, downside drying structure 42 to carry out stoving work through hot gas, reduce maize granule's humidity, carry out stoving work to the maize granule.

The fourth concrete implementation mode: in this embodiment, which is a further limitation of the first embodiment, the upper drying structure 41 includes an accommodating flow passage 411, an inner cavity 412, a speed reduction plate 413, a stirring blade 414, a rotating shaft 415, a discharge port 416, and a hot air hole 417, and a step is formed between the upper drying structure 41 and the lower drying structure 42.

As shown in fig. 1-4: the operation of the upper drying structure 41 is consistent with that of the lower drying structure 42, and only the operation of the upper drying structure 41 will be described here: the rotating shaft 415 is driven by the motor to rotate, the multiple groups of stirring blades 414 on the rotating shaft 415 stir the corn to turn the corn, meanwhile, hot air is sprayed out from the hot air holes 417 to dry corn particles in the turning process, and the drying work of the corn is improved.

The fifth concrete implementation mode: the fourth embodiment is further limited by the fourth embodiment, the section of the accommodating flow channel 411 is in a C-shaped configuration, a plurality of speed reducing plates 413 are uniformly installed on two sides of the inside of the accommodating flow channel 411, meanwhile, the speed reducing plates 413 are in a V-shaped configuration made of metal material, a plurality of turning blocks are uniformly installed on the outer side surfaces of the speed reducing plates 413, and the plurality of speed reducing plates 413 and the plurality of stirring blades 414 are arranged alternately.

As shown in fig. 2-3: hold the inside both sides of runner 411 and evenly install multiunit air brake 413, the setting of air brake 413, make the maize granule striking on air brake 413, reduce the dwell time of maize granule on holding runner 411, increase the stoving effect to the maize granule, the outside surface of air brake 413 evenly installs the multiunit simultaneously and stands up the piece, make the maize granule striking stand up on the piece, make the running state of maize granule change, improve the stoving effect to the maize granule.

As shown in fig. 1 and 2: upside stoving structure 41 relies on agitating unit's mechanical force, the gravity of maize granule, hot-air to the buoyancy of maize granule and the interaction force of hot-air between to the grain granule, makes constantly mix between hot-air and the maize granule, carries out heat transfer to take away the moisture in the grain granule, thereby reach the purpose of dry precipitation.

The sixth specific implementation mode: the second-stage drying structure 5 includes an air outlet 50, an inclined pipe 51, a normal distribution box 52, a blocking column 53, a roller 54, a baffle 55, a corn placing cavity 56, an inserting plate 57, a flow pipe 58, a bagging area 59, a chain wheel 60, a chain 61 and a hot air cavity 62, and the section of the normal distribution box 52 is in an isosceles trapezoid shape.

As shown in fig. 1 and 8-10: the working principle of the secondary drying structure 5 is as follows: a plurality of groups of blocking columns 53 are uniformly arranged in the normal distribution box 52, the blocking columns 53 are arranged in a hollow mode, the outer side surfaces of the blocking columns 53 are uniformly provided with air outlets 50, and hot air is continuously sprayed out of the air outlets 50; meanwhile, when the corn particles impact on the blocking column 53, the corn particles move to the air, so that the circumferential positions of the surfaces of the corn particles are all in contact with hot air, and the surfaces of the corn particles are uniformly dried.

The seventh embodiment: the sixth embodiment is a further limitation of the sixth embodiment, the blocking columns 53 inside the normal distribution box 52 are all hollow, multiple groups of exhaust ports 50 are uniformly formed in the outer side surfaces of the blocking columns 53, meanwhile, the insides of the blocking columns 53 are communicated with a hot air cavity 62 formed in the inner wall of the normal distribution box 52, and the distance between every two adjacent groups of blocking columns 53 is larger than the size of the corn particles.

As shown in fig. 6: the interval between two sets of adjacent blocking post 53 is greater than the size of maize granule for when the maize granule shuttles back and forth between two sets of adjacent blocking post 53, can not block in the inside of normal distribution case 52, six groups of commentaries on classics rollers 54 are synchronous, the syntropy rotates simultaneously, drive the maize granule and remove, further avoid the maize granule card in the inside of normal distribution case 52.

The specific implementation mode is eight: in the sixth embodiment, the rollers 54 are movably disposed inside the normal distribution box 52, the chain wheels 60 are mounted at the ends of the shafts of the six sets of rollers 54, the chain wheels 60 and the chain wheels 60 are driven by the chains 61, the six sets of rollers 54 rotate in the same direction, the six sets of rollers 54 are disposed in the middle of the normal distribution box 52, and the rollers 54 are driven by the motors.

As shown in fig. 6 and 10: six groups rotate and drive the rotation through motor, sprocket 60 and sprocket 60 between the roller 54, can carry the work to the maize granule in the tenesmus, six groups rotate the even distribution of roller 54 in the intermediate position of normal distribution case 52, when the purpose that so sets up is the cooperation maize whereabouts, accord with the mathematical law of normal distribution, the maize granule that is located the inside both sides of normal distribution case 52 is few, the maize granule that is located the inside intermediate position of normal distribution case 52 is many.

The specific implementation method nine: the embodiment is further limited by the first embodiment, a plurality of groups of baffle plates 55 are uniformly installed at the bottom of the normal distribution box 52, a corn placing cavity 56 is formed between two adjacent groups of baffle plates 55, the corn placing cavity 56 and the circulating pipe 58 are isolated by an inserting plate 57, a handle is installed on the inserting plate 57, and the inserting plate 57 is of a detachable structure.

As shown in fig. 6: when the maize stops inside baffle 55, need carry out bagging-off work to the maize granule, specific mode is: the bag is put on the circulating pipe 58, and the inserting plate 57 is drawn out, so that the dried corn particles can be contained in the bag; the maize that is located the middle part is placed the inside maize quantity in chamber 56 and is many, and the maize that is located both sides is placed the inside maize quantity in chamber 56 and is few, and when the bagging-off, the maize of intermediate position is placed chamber 56 and can be adorned several bags more, and the maize of both sides is placed chamber 56 and is adorned several bags less.

The detailed implementation mode is ten: in this embodiment, which is a further limitation of the first embodiment, the primary drying structure 4 and the secondary drying structure 5 are combined together in a layered manner to form a drying device for corn particles, and two sides of the secondary drying structure 5 are mounted on the inner side wall of the dryer housing 3 through brackets.

As shown in fig. 1: one-level stoving structure 4 and 5 lamellar combinations of second grade stoving structure constitute maize granule's drying device together, and maize granule carries out secondary stoving work under one-level stoving structure 4 and second grade stoving structure 5's work, can carry out abundant and even stoving work to maize granule.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a portable grain drying-machine of mixed flow type which characterized in that includes:

the drying machine comprises a vertical lifting machine (1), wherein a dryer shell (3) is installed on the right side of the vertical lifting machine (1), a hot air generating structure (2) is installed on the side wall of the vertical lifting machine (1), meanwhile, a drying feed inlet of the dryer shell (3) is communicated with a discharge pipe of the vertical lifting machine (1), a primary drying structure (4) is installed on the upper side inside the dryer shell (3), a secondary drying structure (5) is installed on the lower side of the primary drying structure (4), an exhaust pipe is installed on the upper right side of the dryer shell (3), and the exhaust pipe is communicated with an inlet of an external bag-type dust collector;

the drying device comprises a primary drying structure (4), wherein the primary drying structure (4) consists of an upper side drying structure (41) and a lower side drying structure (42), the upper side drying structure (41) and the lower side drying structure (42) are consistent in structure, an inner cavity (412) is formed in a containing flow channel (411) on the upper side drying structure (41), a rotating shaft (415) is movably arranged in the containing flow channel (411), the end part of the rotating shaft (415) is fixedly connected with an output shaft of a driving motor, a plurality of groups of stirring blades (414) are uniformly arranged on the surface of the rotating shaft (415), and a plurality of groups of hot air holes (417) are uniformly formed in the surface of the inner wall of the containing flow channel (411);

the two-stage drying structure (5) is characterized in that the upper end of an inclined pipe (51) of the two-stage drying structure (5) is communicated with a discharge port (416) on the lower-side drying structure (42), the bottom of the inclined pipe (51) is fixedly arranged at the upper end of a normal distribution box (52), meanwhile, a plurality of groups of blocking columns (53) are uniformly arranged in the normal distribution box (52), six groups of rotating rollers (54) are uniformly and movably arranged in the normal distribution box (52), a plurality of groups of circulating pipes (58) are uniformly arranged at the bottom of the normal distribution box (52), and the circulating pipes (58) are arranged in a bagging area (59); the hot air generating structure (2) comprises an installation frame (21), a blower (22), a heating device (23), a header pipe (24), an upper support pipe (25) and a lower support pipe (26), the installation frame (21) is installed on the side wall of the vertical elevator (1), the blower (22) and the heating device (23) are installed inside the installation frame (21) respectively, and the air outlet end of the blower (22) is communicated with the header pipe (24) through the heating device (23); the end part of the main pipe (24) is arranged in an inner cavity (412) of the upper side drying structure (41), the bottom of the main pipe (24) is respectively provided with an upper branch pipe (25) and a lower branch pipe (26), the end part of the upper branch pipe (25) is arranged in the inner cavity (412) of the lower side drying structure (42), and the end part of the lower branch pipe (26) is communicated with a hot air cavity (62) formed in the inner wall of the normal distribution box (52); the upper drying structure (41) comprises an accommodating flow channel (411), an inner cavity (412), a speed reducing plate (413), a stirring blade (414), a rotating shaft (415), a discharge hole (416) and a hot air hole (417), and the upper drying structure (41) and the lower drying structure (42) are arranged in a stepped manner; the section of the accommodating flow channel (411) is arranged in a C shape, a plurality of groups of speed reducing plates (413) are uniformly arranged on two sides in the accommodating flow channel (411), meanwhile, the speed reducing plates (413) are of V-shaped structures made of metal materials, a plurality of groups of turning-over blocks are uniformly arranged on the outer side surfaces of the speed reducing plates (413), and the speed reducing plates (413) and the stirring blades (414) are arranged alternately; the secondary drying structure (5) comprises an exhaust port (50), an inclined pipe (51), a normal distribution box (52), a blocking column (53), a rotating roller (54), a baffle plate (55), a corn placing cavity (56), an inserting plate (57), a circulating pipe (58), a bagging area (59), a chain wheel (60), a chain (61) and a hot air cavity (62), and the section of the normal distribution box (52) is arranged in an isosceles trapezoid shape; the blocking columns (53) in the normal distribution box (52) are all arranged in a hollow mode, multiple groups of exhaust ports (50) are uniformly formed in the outer side surfaces of the blocking columns (53), meanwhile, the blocking columns (53) are communicated with a hot air cavity (62) formed in the inner wall of the normal distribution box (52), and the distance between every two adjacent groups of blocking columns (53) is larger than the size of corn particles; the rotary rollers (54) are movably arranged in the normal distribution box (52), chain wheels (60) are mounted at the end parts of shafts on the six groups of rotary rollers (54), meanwhile, the chain wheels (60) and the chain wheels (60) are driven through chains (61), the rotating directions of the six groups of rotary rollers (54) are consistent, the six groups of rotary rollers (54) are arranged in the middle of the normal distribution box (52), and the rotary rollers (54) are driven through motors; a plurality of groups of baffle plates (55) are uniformly arranged at the bottom of the normal distribution box (52), a corn placing cavity (56) is formed between two adjacent groups of baffle plates (55), the corn placing cavity (56) is isolated from the circulating pipe (58) through an inserting plate (57), a handle is arranged on the inserting plate (57), and the inserting plate (57) is of a detachable structure; the primary drying structure (4) and the secondary drying structure (5) are combined together in a layered mode to form the drying device for the corn particles, and two sides of the secondary drying structure (5) are installed on the inner side wall of the dryer shell (3) through a support.