Batch type grain drying machine for grain suspension drying through air flow expansion

Abstract

The invention discloses a batch type grain drying machine for grain suspension drying through airflow expansion, and relates to the technical field, the batch type grain drying machine comprises a drying tower and a heating and drying section, the heating and drying section is located in the drying tower, and air inlet angular boxes and air outlet angular boxes are sequentially distributed in the heating and drying section from top to bottom in an array staggered mode; hot air assemblies communicating with the air inlet angular boxes and exhaust assemblies communicating with the air outlet angular boxes are installed on the two sides of the drying tower correspondingly, the turbulent flow ventilation assemblies are elastically installed on the two sides of the inner wall of the heating and drying section, and the turbulent flow ventilation assemblies and the air inlet angular boxes on the edges are matched to form side edge discharging channels; the drying tower is provided with a plurality of exhaust grooves sealed by the turbulent flow ventilation assembly. The air inlet angular boxes and the air outlet angular boxes which are distributed in a staggered mode are arranged for feeding and discharging air flow and dispersing falling grains, the mixed flowing air flow enables the grains to be evenly dried, when the falling grains are large in quantity, the air exhaust grooves are forced to be opened, and the drying efficiency during synchronous drying of a large number of grains is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grain processing, in particular to a batch grain dryer for air-expanding grain suspension drying. BACKGROUND

[0002] The batch grain drying tower is an important grain drying equipment, which is used for drying high-moisture grain to make the grain reach a dry degree that can be stored, and is usually in a hot air drying mode, that is, the drying of the grain is completed by the flow of hot air during the process of the wet grain descending from the upper grain storage section to the bottom grain discharge section, so that the grain discharged from the bottom grain discharge section is dry enough.

[0003] The existing patent application with the patent publication number CN208480541U and the publication date of February 12, 2019 is named "a grain dryer", which includes a grain elevator, a grain tower and a hot air blower mechanism. In the present application, the grain to be dried is free-falling through the grain channel in the grain tower, and then is collected and transported to the grain elevator by the grain conveying auger for circulation. In the present application, the hot air blower formed by the air blower and the heating source blows hot air to the oven, and the air duct and the grain channel are alternately arranged in the oven and use air-permeable isolation plates. During the falling process of the grain through the grain channel, the hot air passes through the air-permeable isolation plates of the air duct into the grain channel to contact and dry the dynamic grain, thereby improving the drying efficiency and effect.

[0004] The above-mentioned application has the following deficiencies: during the process of circulating drying, the amount of grain discharged into the drying tower can be adjusted in time, but no matter how much or how little grain is discharged, the number of discharge ports will not change. When the amount of grain to be dried is small, the hot air is not fully utilized and is discharged, causing waste of heat energy. If the amount of grain is too much, the speed of air flow carrying water out is not fast enough, which affects the overall drying efficiency. SUMMARY

[0005] The purpose of the present application is to provide a batch grain dryer for air-expanding grain suspension drying to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The batch grain dryer for airflow expansion grain suspension drying comprises a drying tower, a heating drying section located in the drying tower, in which the air inlet corner box and the air outlet corner box are arrayed and staggered from top to bottom, the hot air assembly connected with the air inlet corner box and the exhaust assembly connected with the air outlet corner box are respectively installed on both sides of the drying tower, the turbulence ventilation assembly is elastically installed on the inner wall of the heating drying section, the turbulence ventilation assembly cooperates with each air inlet corner box on the edge to form a side edge material falling channel, and a plurality of exhaust grooves closed by the turbulence ventilation assembly are formed on the drying tower.

[0008] Preferably, the hot air assembly comprises a hot air machine and an air inlet cover installed on one side of the drying tower, and the hot air machine is connected with the air inlet cover through the air pipe.

[0009] Preferably, the circulating lifting mechanism connected with the drying tower is installed on one side of the drying tower, and the flow valve is installed at the connection between the bottom of the drying tower and the circulating lifting mechanism.

[0010] Preferably, the turbulence ventilation assembly comprises the cover plate slidingly installed on the inner wall of the drying tower, the opening corresponding to the exhaust groove is formed on the cover plate, a plurality of turbulence plates distributed upward and downward are installed on one side of the cover plate, the top spring is symmetrically and fixedly connected to the other side of the cover plate, and the bottom end of the top spring abuts against the bottom of the inner wall of the exhaust groove.

[0011] Preferably, the serpentine heat dissipation pipe is horizontally laid in the heating drying section, the serpentine heat dissipation pipe is connected with the air inlet cover, and the serpentine heat dissipation pipe is located above the air inlet corner box.

[0012] Preferably, one end of the serpentine heat dissipation pipe is provided with the air inlet, the other end is fixedly connected with the shunt air blowing pipe, the cooling air blowing section is installed below the heating drying section in the drying tower, and the shunt air blowing pipe is connected with the inside of the cooling air blowing section.

[0013] Preferably, each return bend of one side of the serpentine heat dissipation pipe is located in the air inlet cover.

[0014] Preferably, the air inlet end of the air inlet corner box is larger than the other end, and the air outlet end of the air outlet corner box is larger than the other end.

[0015] Preferably, the heating drying section is a plurality of, the plurality of heating drying sections are overlapped upward and downward, and the inner wall of the heating drying section is further provided with the insertion slot for inserting the cover plate.

[0016] Preferably, the exhaust assembly comprises the exhaust cover installed on the other side of the drying tower, and the exhaust pipe corresponding to each heating drying section is installed on the exhaust cover.

[0017] In the above technical solution, staggered air inlet and outlet corner boxes are used to allow airflow and disperse falling grain. Hot airflow blows up the dispersed grain, and the mixed airflow ensures even and thorough drying. When less grain falls through the heating and drying section, the weight of the grain on its sides is insufficient to significantly press down the turbulence ventilation component. In this case, the turbulence ventilation component always covers the exhaust duct on the side of the drying tower, allowing the hot airflow in the heating and drying section to remain inside for a longer time, thus making fuller use of heat energy and improving the drying effect. When more grain falls, the grain on its sides can press down the turbulence ventilation component a certain distance, forcing the exhaust duct to open. Simultaneously, the original side material drop channel widens, ensuring that when grain accumulates, the airflow inside the heating and drying section quickly discharges moisture, preventing moisture-laden airflow from remaining in the heating and drying section for too long, and improving the drying efficiency when drying large quantities of grain simultaneously.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0019] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a batch grain dryer for airflow expansion grain suspension drying according to the present invention.

[0022] Figure 2 This is an overall side sectional view of a batch grain dryer for airflow expansion grain suspension drying according to the present invention;

[0023] Figure 3 This is an enlarged schematic diagram of point A of a batch grain dryer for airflow expansion grain suspension drying according to the present invention.

[0024] Figure 4 This is a cross-sectional view of the drying tower in a batch grain dryer for airflow expansion grain suspension drying according to the present invention.

[0025] Figure 5 This is a schematic diagram of the drying tower in a batch grain dryer for airflow expansion grain suspension drying according to the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of two heating and drying sections in a batch grain dryer for airflow expansion grain suspension drying according to the present invention.

[0027] Figure 7 This is a schematic diagram of the turbulence ventilation component in a batch grain dryer for airflow expansion and grain suspension drying according to the present invention.

[0028] Figure 8 This is a schematic diagram showing the connection between the serpentine heat dissipation pipe and the diversion air blowing pipe in a batch grain dryer for airflow expansion and grain suspension drying according to the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Drying tower; 101. Exhaust duct; 102. Flow valve; 2. Heating and drying section; 201. Air inlet angle box; 202. Air outlet angle box; 203. Slot; 3. Hot air assembly; 301. Hot air blower; 302. Air inlet hood; 4. Exhaust assembly; 401. Exhaust hood; 402. Exhaust duct; 5. Turbulence ventilation assembly; 501. Cover plate; 502. Opening; 503. Baffle plate; 504. Top spring; 6. Circulating lifting mechanism; 7. Serpentine heat dissipation pipe; 701. Air inlet; 702. Diverting air blowing pipe fittings; 8. Cooling air blowing section; 801. Arc-shaped ventilation grille. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Please see Figures 1-8This invention provides a batch grain dryer for airflow expansion grain suspension drying, comprising a drying tower 1 and a heating drying section 2 located inside the drying tower 1. In the heating drying section 2, air inlet corner boxes 201 and air outlet corner boxes 202 are arranged in an alternating array from top to bottom. Hot air components 3 connected to the air inlet corner boxes 201 and exhaust components 4 connected to the air outlet corner boxes 202 are respectively installed on both sides of the drying tower 1. A turbulence ventilation component 5 is elastically installed on both sides of the inner wall of the heating drying section 2, and the turbulence ventilation component 5 cooperates with each of the edge air inlet corner boxes 201 to form a side material drop channel. Multiple exhaust troughs 101 are opened on the drying tower 1 and are closed by the turbulence ventilation component 5. When the weight of the grain passing through the heating drying section 2 reaches a preset value, the turbulence ventilation component 5 is squeezed downwards, forcing the side material drop channel to widen, and simultaneously opening each exhaust trough 101 to accelerate airflow discharge.

[0033] Specifically, the drying tower 1 is composed of multiple frame sections joined together. The upper layer of the drying tower 1 is a tempering layer, and the heating and drying section 2 is located within the drying tower 1. After the grain passes through the tempering layer and falls into the heating and drying section 2, it is dispersed by the staggered air inlet angle boxes 201 and air outlet angle boxes 202. The hot air generated by the hot air assembly 3 enters the heating and drying section 2 along the air inlet angle boxes 201 and dries the dispersed grain. Then, the airflow containing moisture is discharged from the air outlet angle boxes 202 into the exhaust assembly 4. During the falling process, the grain collides with the air inlet angle boxes 201 and air outlet angle boxes 202, causing a change in the falling direction and making the grain flow in an S-shape. This allows the hot airflow entering the heating and drying section 2 to fully dry the grain between the air inlet angle boxes 201 and air outlet angle boxes 202. During the drying process, the turbulence ventilation assembly 5 will adjust the discharge plate according to the... The amount of grain discharged into the drying tower 1 needs to be adjusted. When less grain passes through the heating and drying section 2, the weight of the grain on the side is insufficient to fully press down the turbulence ventilation component 5, ensuring that the turbulence ventilation component 5 always covers the exhaust chute 101 on the drying tower 1. This ensures that the hot airflow stays in the heating and drying section 2 when less grain is falling, allowing the hot airflow to fully dry the grain and then discharge it with moisture. When more grain is falling, it will accumulate in the heating and drying section 2, slowing down the falling speed. The grain on the side will also continuously compress the turbulence ventilation component 5 during the falling process, forcing the turbulence ventilation component 5 to descend and opening the exhaust chute 101. This allows the airflow in the heating and drying section 2 to be discharged through the air outlet component and the exhaust chute 101 respectively. When there is too much grain in the heating and drying section 2, the airflow carrying moisture is discharged more quickly, improving the efficiency of grain drying.

[0034] Compared with the prior art, the embodiments of the present invention use staggered air inlet corner boxes 201 and air outlet corner boxes 202 to allow airflow and disperse falling grain. After the hot airflow enters, it blows up the dispersed grain. The mixed airflow allows the grain to be dried evenly and fully. When the amount of grain falling through the heating and drying section 2 is small, the weight of the grain on its side is not enough to significantly press down the turbulence ventilation component 5. At this time, the turbulence ventilation component 5 always covers the exhaust duct 101 on the side of the drying tower 1, allowing the hot airflow in the heating and drying section 2 to stay inside for a longer time, making fuller use of heat energy and improving the drying effect. When the amount of grain falling is large, the grain on its side can press down the turbulence ventilation component 5 a certain distance, forcing the exhaust duct 101 to be in an open state. At the same time, the original side material falling channel will also widen, ensuring that the airflow inside the heating and drying section 2 carries moisture and is quickly discharged when the grain is piled up, avoiding the airflow with moisture from staying in the heating and drying section 2 for too long, thus improving the drying efficiency when a large amount of grain is dried simultaneously.

[0035] In a further embodiment of the present invention, the hot air assembly 3 includes a hot air blower 301 and an air inlet hood 302 installed on one side of the drying tower 1. The hot air blower 301 is connected to the air inlet hood 302 through an air duct. One end of each air inlet corner box 201 is connected to the air inlet hood 302. Specifically, the hot airflow generated by the hot air blower 301 enters the air inlet hood 302 through the air duct and is dispersed. Then, it is discharged into the heating and drying section 2 in the drying tower 1 through each air inlet corner box 201 to heat and dry the falling grain. The air inlet hood 302 can ensure that hot airflow flows in each air inlet corner box 201, so as to ensure that the grain is dried evenly.

[0036] In a further embodiment of the present invention, a circulating lifting mechanism 6 connected to one side of the drying tower 1 is installed, and a flow valve 102 is installed at the connection between the bottom of the drying tower 1 and the circulating lifting mechanism 6. Specifically, the circulating lifting mechanism 6 is located on the outside of the drying tower 1. When the grain finishes drying and continues to fall to the bottom of the drying tower 1, the flow valve 102 is opened, and the grain falls into the circulating lifting mechanism 6. Then, it is transported to the top of the drying tower 1 through the circulating lifting mechanism 6, allowing the grain to be poured back into the drying tower 1 for drying again. This allows the grain to be dried repeatedly, making the drying more thorough. Furthermore, by controlling the flow valve 102, the amount of grain discharged back into the drying tower 1 can be adjusted according to the previous degree of drying, further improving the effect of circulating drying.

[0037] In a further embodiment of the present invention, the turbulence ventilation assembly 5 includes a cover plate 501 slidably installed on the inner wall of the drying tower 1. The cover plate 501 has an opening 502 corresponding to the exhaust duct 101. A plurality of vertically distributed turbulence plates 503 are installed on one side of the cover plate 501, forming a side material discharge channel between the turbulence plates 503 and the upper air inlet angle box 201. A top spring 504 is symmetrically fixedly connected to the other side of the cover plate 501. The bottom end of the top spring 504 abuts against the bottom of the inner wall of the exhaust duct 101. At the same time, sliders are also symmetrically installed on this side. A vertical groove matching the slider is opened in the heating and drying section 2. Specifically, under the force of each top spring 504, the cover plate 501 is pushed upward. At this time, the opening 502 on the cover plate 501 and the exhaust duct 101 on the drying tower 1 are staggered. The cover plate 501 seals and closes the exhaust duct 101, so that the hot air generated by the hot air blower 301 can only flow out of the outlet. When the air assembly is discharged outside the tower, the height of the baffle 503 is also higher than the height of its corresponding air outlet corner box 202 when the grain falls sufficiently. The grain falling from the side will press down on the baffles 503 on the cover 501, forcing the cover 501 to descend along with the baffles 503. After the cover 501 descends, the opening 502 on the cover 501 is at the same height as the exhaust duct 101, so that the exhaust duct 101 and the air outlet assembly are in an open state. When there is a lot of grain falling, the airflow mixed with moisture is quickly discharged from the heating and drying section 2, making the airflow smoother. After the cover 501 descends, the baffles 503 will also descend to the same height as their corresponding air outlet corner box 202, making the side material falling channel formed between the baffles 503 and the air inlet corner box 201 wider, avoiding the accumulation of grain for a long time and improving the drying efficiency.

[0038] In a further embodiment of the present invention, a serpentine heat dissipation pipe 7 is horizontally laid in the heating and drying section 2. The serpentine heat dissipation pipe 7 is connected to the air inlet hood 302 and is located above the air inlet corner box 201. Specifically, the serpentine heat dissipation pipe 7 is located above the air inlet corner box 201 and is connected to the air inlet hood 302. When hot air enters the air inlet hood 302, it will not only enter the drying tower 1 through multiple air inlet corner boxes 201, but also enter the serpentine heat dissipation pipe 7 through the pipe opening. When the heat from the serpentine heat dissipation pipe 7 diffuses in the heating and drying section 2, the falling grain will absorb the heat and further dry the moisture in the grain.

[0039] In a further embodiment of the present invention, one end of the serpentine heat dissipation pipe 7 is provided with an air inlet 701, and the other end is fixedly connected to a split-flow air blowing pipe 702. A cooling air blowing section 8 is installed inside the drying tower 1 below the heating and drying section 2. The split-flow air blowing pipe 702 is connected to the interior of the cooling air blowing section 8. The split-flow air blowing pipe 702 is located inside the air inlet hood 302, and a heat insulation plate is fixedly connected in the air inlet hood 302. The heat insulation plate is located above the split-flow air blowing pipe 702. Specifically, when... After the hot air enters through the air inlet 701 on the serpentine heat dissipation pipe 7, the heat will gradually dissipate along the pipe wall. At the same time, the heat insulation plate will separate the hot air from the hot air blown into the air inlet hood 302 by the hot air blower. Then, the air with reduced heat will be blown into the cooling air section 8 through the split air blowing pipe 702. There is no need to install a separate cold air blower to cool the dried grain, saving the cost of drying equipment. In addition, the air in the serpentine heat dissipation pipe 7 does not contain moisture, which can prevent the grain from becoming damp again.

[0040] In a further embodiment of the present invention, two rows of staggered arc-shaped ventilation grilles 801 are installed inside the cooling air blowing section 8. The air outlet of the diversion air blowing pipe 702 is located between the two rows of arc-shaped ventilation grilles 801. Specifically, when the cooled airflow is evenly blown into the cooling air blowing section 8 along the diversion air blowing pipe 702, the arc-shaped ventilation grilles 801 also disperse the falling grain, allowing the grain to fully contact the blown airflow.

[0041] In a further embodiment of the present invention, each bend on one side of the serpentine heat dissipation pipe 7 is located inside the air inlet shroud 302. Specifically, when hot air enters the air inlet shroud 302, it can always blow onto the bend of the serpentine heat dissipation pipe 7 to keep the serpentine heat dissipation pipe 7 warm, so that the heat inside the serpentine heat dissipation pipe 7 lasts longer and improves the effect of the serpentine heat dissipation pipe 7 in heating and drying grain.

[0042] In a further embodiment of the present invention, the air inlet end of the air inlet angle box 201 is larger than its other end, and the air outlet end of the air outlet angle box 202 is larger than its other end. Specifically, when the falling grain passes through the staggered air inlet angle boxes 201 and air outlet angle boxes 202, it will not only flow downward in an S-shape, but also generate mixed flow due to the different sizes at both ends of the air inlet angle boxes 201 and air outlet angle boxes 202, making the direction of grain falling more diverse, and also making the airflow mix and flow in the drying tower 1, so that the grain and the hot airflow can come into full contact.

[0043] In a further embodiment of the present invention, there are multiple heating and drying sections 2, which are overlapped one on the top and one on the bottom. There is a tempering layer between two heating and drying sections 2. The inner wall of the heating and drying section 2 is also provided with a slot 203 for the cover plate 501 to be inserted. Specifically, the internal structure of the two heating and drying sections 2 is the same. During the process of the grain falling, it is tempered first, and then passes through each heating and drying section 2 in sequence until it is discharged or discharged into the circulation lifting mechanism 6. Multiple drying and tempering are completed in one drying cycle, avoiding over-drying and causing the grain to burst. The serpentine heat dissipation pipes 7 in the two heating and drying sections 2 are connected to the diversion air blowing pipes 702 in the cooling air blowing section 8 to increase the air volume.

[0044] In a further embodiment of the present invention, the exhaust assembly 4 includes an exhaust hood 401 installed on the other side of the drying tower 1. The exhaust hood 401 is equipped with exhaust pipes 402 corresponding to each heating and drying section 2. One end of the air outlet angle box 202 is connected to the exhaust hood 401. Specifically, the exhaust hood 401 collects the airflow blown out from each air outlet angle box 202 and discharges it from the two exhaust pipes 402 respectively, so as to avoid the moisture-laden airflow not being discharged in time, causing moisture to re-adhere to the grain in the drying tower 1.

[0045] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A batch grain dryer for airflow expansion grain suspension drying, comprising a drying tower (1), characterized in that, Also includes: The heating and drying section (2) is located inside the drying tower (1). The heating and drying section (2) has an air inlet corner box (201) and an air outlet corner box (202) arranged in an alternating array from top to bottom. The drying tower (1) is equipped with a hot air assembly (3) connected to the air inlet corner box (201) and an exhaust assembly (4) connected to the air outlet corner box (202) on both sides respectively. The turbulence ventilation component (5) is flexibly installed on both sides of the inner wall of the heating and drying section (2), and the turbulence ventilation component (5) and the edge air inlet corner boxes (201) cooperate to form a side material drop channel. The drying tower (1) has multiple exhaust slots (101) that are closed by the turbulence ventilation component (5). When the weight of the grain after passing through the heating and drying section (2) reaches the preset value, the turbulence ventilation component (5) is squeezed downward, which forces the side discharge channel to widen, and at the same time opens each exhaust duct (101) to accelerate the discharge of airflow.

2. The batch grain dryer for airflow expansion grain suspension drying according to claim 1, characterized in that, The hot air assembly (3) includes a hot air blower (301) and an air inlet hood (302) installed on one side of the drying tower (1). The hot air blower (301) is connected to the air inlet hood (302) through an air duct.

3. The batch grain dryer for airflow expansion grain suspension drying according to claim 1, characterized in that, A circulating lifting mechanism (6) is installed on one side of the drying tower (1) and connected thereto, and a flow valve (102) is installed at the connection between the bottom of the drying tower (1) and the circulating lifting mechanism (6).

4. A batch grain dryer for airflow expansion grain suspension drying according to claim 1, characterized in that, The turbulence ventilation assembly (5) includes a cover plate (501) that is slidably installed on the inner wall of the drying tower (1). The cover plate (501) has an opening (502) corresponding to the exhaust duct (101). A plurality of vertically distributed turbulence plates (503) are installed on one side of the cover plate (501). A top spring (504) is symmetrically fixedly connected to the other side of the cover plate (501). The bottom end of the top spring (504) abuts against the bottom of the inner wall of the exhaust duct (101).

5. A batch grain dryer for airflow expansion grain suspension drying according to claim 1, characterized in that, The heating and drying section (2) is horizontally laid with a serpentine heat dissipation pipe (7), which is connected to the air inlet shroud (302) and is located above the air inlet corner box (201).

6. A batch grain dryer for airflow expansion grain suspension drying according to claim 5, characterized in that, The serpentine heat dissipation pipe (7) has an air inlet (701) at one end and a split air blowing pipe (702) fixedly connected at the other end. The drying tower (1) has a cooling air blowing section (8) installed inside below the heating and drying section (2). The split air blowing pipe (702) is connected to the interior of the cooling air blowing section (8).

7. A batch grain dryer for airflow expansion grain suspension drying according to claim 5, characterized in that, Each bend on one side of the serpentine heat pipe (7) is located inside the air intake shroud (302).

8. A batch grain dryer for airflow expansion grain suspension drying according to claim 1, characterized in that, The air inlet end of the air inlet angle box (201) is larger than its other end, and the air outlet end of the air outlet angle box (202) is larger than its other end.

9. A batch grain dryer for airflow expansion grain suspension drying according to claim 4, characterized in that, There are multiple heating and drying sections (2), and the multiple heating and drying sections (2) are connected vertically. The inner wall of the heating and drying section (2) is also provided with a slot (203) for the cover plate (501) to be inserted.

10. A batch grain dryer for airflow expansion grain suspension drying according to claim 1, characterized in that, The exhaust assembly (4) includes an exhaust hood (401) installed on the other side of the drying tower (1), and the exhaust hood (401) is equipped with exhaust pipes (402) corresponding to each heating and drying section (2).

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