CN114674130A

CN114674130A - Controllable high-efficient grain drying-machine of temperature

Info

Publication number: CN114674130A
Application number: CN202210307645.4A
Authority: CN
Inventors: 张书宏; 叶新国; 张利
Original assignee: Hefei Sanwu Mechanical Co ltd
Current assignee: Hefei Sanwu Mechanical Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-06-28
Anticipated expiration: 2042-03-25
Also published as: CN114674130B

Abstract

The invention discloses a temperature-controllable efficient grain dryer, which belongs to the technical field of grain dryers and comprises a shell, wherein a moving structure is arranged on the top surface of the shell, a feeding structure is fixed at the movable end of the moving structure, a dehumidifying groove is formed in the front surface of the shell in an array mode and penetrates through the front surface of the shell, a filter screen, a uniform turning structure and a heating structure are sequentially fixed in the shell in a multi-layer array mode from top to bottom, a drying disc is arranged between the uniform turning structure and the heating structure, and the drying disc is connected with the shell in a sliding mode. This product is when drying, and the feed structure can pave grain in drying plate surface uniformly, pushes away the drying plate in the casing again, opens the air supply structure, to the air supply in the casing, adjusts heating structure's temperature, the wind heating of will sending into to hot-blast drying is carried out moist grain.

Description

Controllable high-efficient grain drying-machine of temperature

Technical Field

The invention relates to the technical field of grain dryers, in particular to a temperature-controllable efficient grain dryer.

Background

Food is a living organism and water is the condition on which it depends to survive. However, the excessive water content can induce the breeding of insects and microorganisms, which easily causes the heating, fermentation, deterioration and germination rate reduction of grains. Taking grains as an example, the water content of the grains during harvesting is 25-30%, and the safe water content needs to be reduced to 13-15% as soon as possible during storage. The grains in China are harvested 1-3 times a year and stored for several years, but in the grain production process and grain drying link, natural airing is easily limited by the influence of weather, places and the like. Along with the popularization and application of large areas of grain harvesters and the rise of large grain farmers, natural airing can not meet the requirements more and more, and grain drying equipment is needed. The current grain drying devices mainly comprise two types, namely a tower type drying machine and a fluidized bed drying device, wherein a batch type circulating grain drying machine in the tower type drying machine is most widely applied. The batch type circulating grain dryer comprises a tempering chamber, a drying chamber, a lifter and an electric control part, wherein hot air is generated by taking burning diesel oil, coal, firewood, straws, electric heating and the like as heat sources, flows in the drying chamber and is contacted with grains in the flowing process, so that moisture in the hot air is taken away to dry the grains.

It is known that when the temperature and humidity conditions in the environment of the grain satisfy the growth and reproduction of microorganisms, the grain will mildew. That is, moisture and temperature are two important factors for the propagation of microorganisms such as mold in the grain (i.e., the grain mildews). Generally, the moisture of the grains is controlled below safe moisture, so that the grains can be prevented from mildewing. At present, the method for reducing the moisture of the grains is a spontaneous combustion airing method. In a grain main production area, due to the large yield and the insufficient airing field, the moisture of grains purchased in a grain depot often exceeds safe moisture, so that the grains in the grain depot are a main factor causing the grain mildew, particularly in the grain purchasing period, the grains catch up to cloudy days; in addition, even if the moisture of the grain does not exceed the safe moisture during warehousing, the grain needs to be aired regularly due to spontaneous combustion and moisture regain so as to ensure that the grain does not mildew, and the grain warehoused cannot be aired on time due to the limitation of the airing field of the grain warehouse, so that the grain warehouse mildew is caused.

At present, the industrial drying of grain under the prior art adopts two kinds of modes, electric heat drying and ventilation drying, however, the difficult temperature control of electric heat drying, moist cereal heat up to higher temperature in the short time, the condition of grain explosion easily takes place, influences the quality of grain, and the mode of ventilation drying, then drying efficiency is lower, and the stoving of a large amount of grain can waste a large amount of time. The invention aims to provide a temperature-controllable efficient grain dryer, and aims to solve the technical problems that in the prior art, the drying temperature of the grain dryer is not easy to control, and grains are easy to explode during drying.

Disclosure of Invention

Aiming at the problems, the invention provides a temperature-controllable high-efficiency grain dryer which comprises a shell, wherein a moving structure is arranged on the top surface of the shell, a feeding structure is fixed at the movable end of the moving structure, a moisture discharging groove is formed in the front surface of the shell in an array mode and penetrates through the front surface of the shell, a filter screen, a uniform turning structure and a heating structure are sequentially fixed in the shell in a multilayer array mode from top to bottom, a drying disc is arranged between the uniform turning structure and the heating structure, and the drying disc is connected with the shell in a sliding mode.

Furthermore, a sliding groove is formed in the connecting position of the drying disc and the shell, the sliding groove is fixed to the inner wall of the shell, an air supply structure penetrates through the back of the shell, and an air inlet of the air supply structure is connected with an air blower in a flange mode;

the air supply structure comprises an air supply pipe fixed to the back face of the shell, the joint of the air supply pipe and the shell is an air outlet, the air outlets are formed between the two adjacent layers of heating structures and the filter screen, and the air outlet is movably connected with a rotating structure. The below of every layer of drying dish all is equipped with independent air outlet, the warm braw of raising up is dried grain, throw away under the prior art, only set up the wind gap in the bottom and dry, steam after the stoving rises, the air humidity that leads to the upper strata is bigger, the grain drying efficiency that leads to being located the grain on upper strata and lower floor differs, thereby can not carry out the unified stoving and the recovery of grain, work efficiency has been reduced, and in this product, every layer of independent air outlet, can guarantee every layer of drying efficiency's unification.

Furthermore, the rotating structure comprises air guide grooves embedded at the air outlets, the air guide grooves in each row are movably connected through connecting rods, each connecting rod is connected through a linkage structure, the linkage structure is driven through a servo motor, and the servo motor is bolted to the outer side wall of the shell. The wind guide groove carries out the control of wind direction, and the wind guide groove can realize upwards and decurrent air supply under servo motor's drive, during the side top air supply, can dry the grain on upper strata, when carrying out the air supply to the side below, can drive away the steam that produces when lower floor's grain is dried, discharges steam through the wet groove of discharging, improves drying efficiency.

Further, there is moisture absorption structure at the middle part of blast pipe through flange joint, moisture absorption structure includes the moisture absorption pipe with blast pipe flange joint, and moisture absorption pipe and blast pipe junction do sealed the processing, the network structure of ventilation has all been inlayed at the both ends of moisture absorption pipe, the intussuseption of moisture absorption is filled with activated carbon particle, and activated carbon particle's diameter is greater than network structure's mesh diameter. The active carbon granule in the moisture absorption structure can be dried in advance the air supply, reduces the relative air humidity of air supply, can effectively improve drying efficiency.

Further, turn over even structure including the pivot that runs through the casing lateral wall, the surperficial circumference array of pivot has the arc, the end fixing of pivot has the drive wheel, drive wheel surface nestification has the belt, and links through drive wheel and belt between the pivot, the pivot is through turning over even motor drive, and turns over even motor and be fixed in the casing lateral wall. Through the drive of the even motor that turns over, through the transmission of drive wheel for the arc rotates in the drying dish, raises the grain in the drying dish, makes grain dry evenly, simultaneously, has improved drying efficiency.

Further, heating structure is including being located two-layer baffle under the drying pan, and the even shells inner wall of two-layer baffle is fixed, the air vent has been seted up to the even array in baffle surface, and is two-layer be equipped with steam coil pipe between the baffle, and steam coil pipe's air inlet and gas outlet run through the casing lateral wall. This product adopts steam coil's mode heat supply, carries out the circulation of suitable temperature steam through air inlet and gas outlet, for the air supply heating to suitable temperature to realized the effective stoving of grain, and the baffle effectively keeps apart steam coil and grain, prevents that the grain temperature from rising suddenly, takes place to explode the grain.

Further, the drying plate comprises a frame connected with the sliding groove in a sliding mode, a bottom plate is embedded in the side face of the frame and connected with the frame in a sliding mode, the ventilation groove is formed in the surface array of the bottom plate, and a pull groove is formed in the side face of the bottom plate. This product is carrying out the stoving back of grain, pulls out the drying dish in the casing, pulls out the bottom plate in the side of drying dish, takes the bottom plate out in the frame, and then grain in the drying dish leaks from the frame bottom surface to realize the quick collection of stoving grain.

Further, the mobile structure includes two spacing grooves formed in the top surface of the housing, the spacing grooves are parallel to the front surface of the housing, a movable rod is arranged under the spacing grooves and embedded in the top surface of the housing, the movable rod is connected with the housing in a sliding manner in the horizontal direction, a limiting bolt is bolted to the surface of the movable rod, and the movable rod is connected with the spacing grooves in a sliding manner through the limiting bolt.

Further, the feed structure includes the clamp fixed with the activity rod tip, the clamp is embedded to have a feeding hose, and feeding hose is fixed in the activity rod tip through the clamp, feeding hose's terminal through connection has the rectangle discharge gate, feeding hose's middle part is equipped with the stop valve. When carrying out the material loading of this product, take out the drying pan in the casing, at the slip movable rod of shell top surface for the movable rod passes through spacing bolt and slides for the spacing groove, then the rectangle discharge gate on movable rod top slides at the uniform velocity for the drying pan horizontal direction, opens the stop valve, and moist grain passes through the feeding hose and discharges, evenly paves in the drying pan surface evenly through the rectangle discharge gate, after the one deck that tiles, can push into the drying pan and dry in the casing.

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

one of them, this product is when drying, carries out the feeding of moist grain through the feed structure, according to how much of grain, pulls open the drying dish of certain quantity in proper order on the casing surface, and drying dish roll-off casing, feed structure paves grain in the drying dish surface uniformly, pushes away the drying dish in the casing again, opens the air supply structure, supplies air in to the casing, adjusts the temperature of heating structure, the wind heating that will send into to hot-blast stoving moist grain.

Secondly, an independent air outlet is formed below each layer of drying plate, grain is dried by the aid of upward warm air, and in the prior art, only an air port is formed in the bottom of the drying plate for drying, and dried hot air rises to cause higher air humidity of the upper layer and cause different drying efficiencies of the grain on the upper layer and the grain on the lower layer, so that the grain cannot be uniformly dried and recycled, the working efficiency is reduced, and in the product, the uniformity of the drying efficiency of each layer can be guaranteed by the aid of the independent air outlets of each layer.

Thirdly, the wind guide groove is adopted to control the wind direction, the wind guide groove can realize upward and downward air supply under the driving of the servo motor, when the air is supplied to the upper side, the grains on the upper layer can be dried, and when the air is supplied to the lower side, the water vapor generated when the grains on the lower layer are dried can be removed, and the water vapor is discharged through the moisture discharging groove, so that the drying efficiency is improved.

Fourthly, the activated carbon particles in the moisture absorption structure can dry the air supply in advance, reduce the relative air humidity of the air supply and effectively improve the drying efficiency.

Fifthly, the arc-shaped plate rotates in the drying plate through the driving of the uniform turning motor and the transmission of the transmission wheel, so that the grains in the drying plate are lifted, the grains are dried uniformly, and meanwhile, the drying efficiency is improved.

Its six, when carrying out the material loading of this product, take out the drying pan in the casing, at the slip movable rod of housing face for the movable rod passes through spacing bolt and slides for the spacing groove, then the rectangle discharge gate on movable rod top slides at the uniform velocity for the drying pan horizontal direction, opens the stop valve, and moist grain passes through the feeding hose and discharges, evenly paves in the drying pan surface through the rectangle discharge gate, after the one deck that tiles, can push into the casing with the drying pan and dry.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic major isometric view of a body of the present invention;

FIG. 2 is a right side schematic view of the present invention;

FIG. 3 is a schematic view of the structure of the drying pan according to the present invention;

FIG. 4 is a rear view of the present invention;

FIG. 5 is a cross-sectional view in elevation of the present invention;

FIG. 6 is a schematic view of a turn-up structure according to the present invention;

FIG. 7 is a schematic view of a heating structure according to the present invention;

FIG. 8 is a schematic view of a rotary structure according to the present invention;

FIG. 9 is a schematic view of a loading structure and a moving structure of the present invention;

fig. 10 is a cross-sectional view of an absorbent structure according to the present invention.

Reference numerals:

1. a housing; 2. a feeding structure; 21. a feed hose; 22. clamping a hoop; 23. a stop valve; 24. a rectangular discharge port; 3. a moving structure; 31. a movable rod; 32. a limiting groove; 33. a limit bolt; 4. a moisture removal groove; 5. filtering with a screen; 6. a uniform structure is turned; 61. a rotating shaft; 62. an arc-shaped plate; 63. a driving wheel; 64. a belt; 65. a motor is turned evenly; 7. a chute; 8. drying the disc; 81. a frame; 82. a base plate; 83. a ventilation slot; 84. groove drawing; 9. a heating structure; 91. a partition plate; 92. a vent hole; 93. a steam coil; 10. an air supply structure; 1001. an air supply pipe; 1002. a rotating structure; 1002a, an air guide groove; 1002b, a connecting rod; 1002c, a linkage structure; 1002d, a servo motor; 11. a moisture-absorbing structure; 1101. a moisture absorbing tube; 1102. activated carbon particles.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a temperature-controllable efficient grain dryer which comprises a shell 1, wherein a moving structure 3 is arranged on the top surface of the shell 1, a feeding structure 2 is fixed on the movable end of the moving structure 3, a moisture discharging groove 4 is formed in the front surface of the shell 1 in an array mode, the moisture discharging groove 4 penetrates through the front surface of the shell 1, a filter screen 5, a turn-over uniform structure 6 and a heating structure 9 are sequentially fixed in the shell 1 in a multi-layer array mode from top to bottom, a drying disc 8 is arranged between the turn-over uniform structure 6 and the heating structure 9 and is in sliding connection with the shell 1, a sliding groove 7 is formed in the connection position of the drying disc 8 and the shell 1, the sliding groove 7 is fixed on the inner wall of the shell 1, an air supply structure 10 penetrates through the back surface of the shell 1, and an air inlet of the air supply structure 10 is in flange connection with an air blower. This product is carrying out the during operation, carry out the feeding of moist grain through loading structure 2, according to how much of grain, pull open the drying dish 8 of certain quantity in proper order on casing 1 surface, drying dish 8 roll-off casing 1, loading structure 2 paves grain evenly on drying dish 8 surfaces, again with drying dish 8 push casing 1 in, open air supply structure 10, to the air supply in the casing 1, adjust the temperature of heating structure 9, the wind heating that will send into, thereby hot-blast is dried moist grain.

Specifically, air supply structure 10 includes the blast pipe 1001 fixed with the casing 1 back, and the junction of blast pipe 1001 and casing 1 is the air outlet, and has all seted up the air outlet between adjacent two-layer heating structure 9 and the filter screen 5, and air outlet department swing joint has rotating-structure 1002. Every layer of drying dish 8's below all is equipped with independent air outlet, the warm braw of raising up is dried grain, prior art has been abandoned down, only set up the wind gap in the bottom and dry, steam after the stoving rises, the air humidity that leads to the upper strata is bigger, the grain drying efficiency who leads to being located the grain on upper strata and lower floor differs, thereby can not carry out the unified stoving and the recovery of grain, work efficiency has been reduced, and in this product, every layer of independent air outlet, can guarantee every layer of drying efficiency's unity.

Specifically, the rotating structure 1002 comprises air guide grooves 1002a embedded at each air outlet, the air guide grooves 1002a in each row are movably connected through a connecting rod 1002b, each connecting rod 1002b is connected through a linkage structure 1002c, the linkage structure 1002c is driven by a servo motor 1002d, and the servo motor 1002d is bolted to the outer side wall of the housing 1. The wind guide groove 1002a controls the wind direction, the wind guide groove 1002a can realize upward and downward air supply under the driving of the servo motor 1002d, when air is supplied to the upper side, grains on the upper layer can be dried, when air is supplied to the lower side, water vapor generated when grains on the lower layer are dried can be driven, and the water vapor is discharged through the moisture discharging groove 4, so that the drying efficiency is improved.

Specifically, there is moisture absorption structure 11 in the middle part of blast pipe 1001 through flange joint, and moisture absorption structure 11 includes the moisture absorption pipe 1101 with blast pipe 1001 flange joint, and moisture absorption pipe 1101 and blast pipe 1001 junction do sealing process, and the network structure of ventilation has all been inlayed at the both ends of moisture absorption pipe 1101, and the moisture absorption pipe 1101 intussuseption is filled with activated carbon particle 1102, and activated carbon particle 1102's diameter is greater than network structure's mesh diameter. The activated carbon particles 1102 in the moisture absorption structure 11 can dry the supplied air in advance, reduce the relative air humidity of the supplied air and effectively improve the drying efficiency.

Specifically, the turn-even structure 6 comprises a rotating shaft 61 penetrating through the side wall of the shell 1, an arc-shaped plate 62 is arranged on the circumferential array of the surface of the rotating shaft 61, a driving wheel 63 is fixed at the end part of the rotating shaft 61, a belt 64 is nested on the surface of the driving wheel 63, the rotating shafts 61 are linked with each other through the driving wheel 63 and the belt 64, the rotating shaft 61 is driven by a turn-even motor 65, and the turn-even motor 65 is fixed on the side wall of the shell 1. Through the drive of the even motor 65 that turns over, through the transmission of drive wheel 63 for arc 62 is at drying tray 8 internal rotation, and the grain in drying tray 8 is raised, makes the grain dry evenly, simultaneously, has improved drying efficiency.

Specifically, heating structure 9 is including being located two-layer baffle 91 under drying tray 8, and the even 1 inner wall of casing of two-layer baffle 91 is fixed, and air vent 92 has been seted up to the even array in baffle 91 surface, is equipped with steam coil pipe 93 between two-layer baffle 91, and steam coil pipe 93's air inlet and gas outlet run through the casing 1 lateral wall. This product adopts steam coil 93's mode heat supply, carries out the circulation of suitable temperature steam through air inlet and gas outlet, for the air supply heating to suitable temperature to realized the effective stoving of grain, and baffle 91 effectively keeps apart steam coil 93 and grain, prevents that grain temperature surge from taking place to explode the grain.

Specifically, the drying tray 8 includes a frame 81 slidably connected to the chute 7, a bottom plate 82 is embedded in a side surface of the frame 81, the bottom plate 82 is slidably connected to the frame 81, ventilation grooves 83 are formed in an array on a surface of the bottom plate 82, and pull grooves 84 are formed in a side surface of the bottom plate 82. This product is carrying out the stoving back of grain, pulls out drying tray 8 in the casing 1, and bottom plate 82 is taken out in drying tray 8's side, takes bottom plate 82 from frame 81, and then the grain in the drying tray 8 spills from the frame 81 bottom surface to realize the quick collection of stoving grain.

Specifically, the mobile structure 3 includes two spacing grooves 32 arranged on the top surface of the housing 1, the spacing grooves 32 are parallel to the front surface of the housing 1, a movable rod 31 is arranged under the spacing grooves 32, the movable rod 31 is embedded on the top surface of the housing 1, the movable rod 31 is connected with the housing 1 in a sliding manner in the horizontal direction, a spacing bolt 33 is bolted on the surface of the movable rod 31, and the movable rod 31 is connected with the spacing grooves 32 in a sliding manner through the spacing bolt 33.

Specifically, feed structure 2 includes the clamp 22 with the end fixing of movable rod 31, and the clamp 22 is embedded to have feeding hose 21, and feeding hose 21 is fixed in the end of movable rod 31 through clamp 22, and feeding hose 21's terminal through connection has rectangle discharge gate 24, and feeding hose 21's middle part is equipped with stop valve 23. When carrying out the material loading of this product, take out drying plate 8 in casing 1, at the sliding movable rod 31 of 1 top surface of casing, make movable rod 31 slide for spacing groove 32 through spacing bolt 33, then the rectangle discharge gate 24 on movable rod 31 top slides at the uniform velocity for drying plate 8 horizontal direction, open stop valve 23, moist grain passes through feeding hose 21 and discharges, evenly pave in drying plate 8 surfaces through rectangle discharge gate 24, after the tiling one deck, can dry in pushing into casing 1 with drying plate 8.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a controllable high-efficient grain drying-machine of temperature, includes casing (1), its characterized in that:

the top surface of the shell (1) is provided with a moving structure (3), a feeding structure (2) is fixed at the movable end of the moving structure (3), the front surface of the shell (1) is provided with humidity discharging grooves (4) in an array mode, and the humidity discharging grooves (4) penetrate through the front surface of the shell (1);

a filter screen (5), a uniform turning structure (6) and a heating structure (9) are sequentially fixed in the shell (1) in a multilayer array from top to bottom;

a drying disc (8) is arranged between the uniform-turning structure (6) and the heating structure (9), and the drying disc (8) is connected with the shell (1) in a sliding manner.

2. The high-efficiency grain dryer with controllable temperature as claimed in claim 1, wherein:

a sliding chute (7) is arranged at the joint of the drying disc (8) and the shell (1), the sliding chute (7) is fixed with the inner wall of the shell (1), an air supply structure (10) penetrates through the back of the shell (1), and an air inlet of the air supply structure (10) is connected with an air blower in a flange mode;

the air supply structure (10) comprises an air supply pipe (1001) fixed on the back of the shell (1), and an air outlet is formed at the joint of the air supply pipe (1001) and the shell (1);

air outlets are formed between the adjacent two layers of heating structures (9) and the filter screen (5), and the air outlets are movably connected with rotating structures (1002).

3. The temperature-controllable high-efficiency grain dryer according to claim 2, characterized in that:

the rotating structure (1002) comprises an air guide groove (1002a) embedded at each air outlet;

the air guide grooves (1002a) in each row are movably connected through connecting rods (1002b), and each connecting rod (1002b) is connected through a linkage structure (1002 c);

the linkage structure (1002c) is driven by a servo motor (1002d), and the servo motor (1002d) is bolted to the outer side wall of the shell (1).

4. The high-efficiency grain dryer with controllable temperature as claimed in claim 2, wherein:

the middle part of the blast pipe (1001) is connected with a moisture absorption structure (11) through a flange, the moisture absorption structure (11) comprises a moisture absorption pipe (1101) which is connected with the blast pipe (1001) through the flange, and the joint of the moisture absorption pipe (1101) and the blast pipe (1001) is sealed;

the both ends of moisture absorption pipe (1101) all inlayed ventilated network structure, moisture absorption pipe (1101) intussuseption is filled with activated carbon particle (1102), and activated carbon particle (1102)'s diameter is greater than network structure's mesh diameter.

5. The high-efficiency grain dryer with controllable temperature as claimed in claim 1, wherein:

the uniform turning structure (6) comprises a rotating shaft (61) penetrating through the side wall of the shell (1), and arc-shaped plates (62) are arrayed on the circumference of the surface of the rotating shaft (61);

a driving wheel (63) is fixed at the end part of the rotating shaft (61), a belt (64) is nested on the surface of the driving wheel (63), and the rotating shafts (61) are linked with the belt (64) through the driving wheel (63);

the rotating shaft (61) is driven by the turn-over uniform motor (65), and the turn-over uniform motor (65) is fixed on the side wall of the shell (1).

6. The high-efficiency grain dryer with controllable temperature as claimed in claim 1, wherein:

the heating structure (9) comprises two layers of partition boards (91) which are positioned right below the drying disc (8), and the two layers of partition boards (91) are fixed on the inner wall of the shell (1);

air vents (92) are uniformly formed in the surface of the partition board (91) in an array mode, a steam coil (93) is arranged between the two layers of partition boards (91), and an air inlet and an air outlet of the steam coil (93) penetrate through the side wall of the shell (1).

7. The high-efficiency grain dryer with controllable temperature as claimed in claim 2, wherein:

the drying tray (8) comprises a frame (81) connected with the sliding groove (7) in a sliding mode, a bottom plate (82) is embedded in the side face of the frame (81), and the bottom plate (82) is connected with the frame (81) in a sliding mode;

ventilating grooves (83) are formed in the surface of the bottom plate (82) in an array mode, and pull grooves (84) are formed in the side face of the bottom plate (82).

8. The high-efficiency grain dryer with controllable temperature as claimed in claim 1, wherein:

the movable structure (3) comprises two limiting grooves (32) formed in the top surface of the shell (1), the limiting grooves (32) are parallel to the front surface of the shell (1), movable rods (31) are arranged under the limiting grooves (32), the movable rods (31) are embedded in the top surface of the shell (1), and the movable rods (31) are connected with the shell (1) in a sliding mode in the horizontal direction;

the surface of the movable rod (31) is bolted with a limiting bolt (33), and the movable rod (31) is connected in a sliding way in the limiting groove (32) through the limiting bolt (33).

9. The temperature-controllable efficient grain dryer of claim 8, wherein:

the feeding structure (2) comprises a hoop (22) fixed to the end portion of the movable rod (31), a feeding hose (21) is embedded in the hoop (22), and the feeding hose (21) is fixed to the end portion of the movable rod (31) through the hoop (22);

the end of the feeding hose (21) is connected with a rectangular discharge hole (24) in a penetrating manner, and the middle of the feeding hose (21) is provided with a stop valve (23).