Hot air circulation type drying machine for grains

Abstract

The utility model discloses a hot air circulation type dryer for grain, which relates to the technical field of grain processing and comprises a drying box, a drying mechanism, a drying pump, a drying air passage and a drying plate, the drying pump is arranged at the bottom of the drying box, the drying air passage is arranged in the middle of the drying box, and an air outlet passage of the drying pump is connected with the drying air passage. A plurality of sets of stacked drying plates are arranged in the drying box, and a circulating airflow channel is formed through the structure that the drying air channels are combined with the drying plates to dry grains. The circulating airflow channel is formed through the structure that the drying air channel is combined with the drying plate to dry grains, air in the drying air channel is guided out into the structural cabin dried by the drying plate in the drying box through the air outlet, and the hollowed-out hole is formed in the middle of the drying plate to ensure that airflow penetrates through and circulates from bottom to top. The contact area of airflow and grain drying is increased, and the drying efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of grain processing, especially relates to a hot air circulation type dryer for grain. BACKGROUND

[0002] Grain safety is related to the national economy and people's livelihood, and the safe storage of grain is one of the important factors affecting grain safety. The loss during grain storage is serious in China every year, and timely drying of post-harvest grain can reduce the loss during storage. Grain drying includes processes such as grain transportation, cleaning and drying. The current domestic grain drying processes are often carried out separately, which seriously affects the overall efficiency of grain drying production and makes it difficult to ensure the quality of dried grain. Based on the grain dryer and biomass pellet fuel hot blast stove produced by a certain agricultural machinery enterprise, the mechanical equipment required for each process of grain drying is first selected and matched, and then the existing hot blast stove is improved and designed to meet the production requirements. Then, the control principle of the system is studied, and finally a set of grain drying system is built, which can realize the automation of the whole process of grain drying.

[0003] The existing grain drying equipment has a single structure and is dried by heating air flow, but the air flow flows through once, the drying efficiency is low, and the heat is wasted, resulting in low drying energy efficiency ratio of the equipment. Therefore, we propose a hot air circulation type dryer for grain. UTILITARIAN CONTENT

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the utility model provides a hot air circulation type dryer for grain, which solves the technical problems in the background art.

[0006] (II) Technical scheme

[0007] To achieve the above purpose, the utility model realizes the following technical scheme:

[0008] A hot air circulation type dryer for grain comprises

[0009] A drying box is a hollow cylindrical sealed cavity,

[0010] A drying mechanism comprises a drying pump, a drying air duct and a drying plate. The drying pump is arranged at the bottom of the drying box, the drying air duct is arranged in the middle of the drying box, the air outlet of the drying pump is connected with the drying air duct to form a channel for the heat dissipation air flow to enter, and a plurality of groups of stacked drying plates are arranged in the drying box. The grain to be dried is placed in the drying plate. The structure of the drying air duct and the drying plate forms a circulating air flow channel to dry the grain.

[0011] Preferably, the drying air duct is a cylindrical passage open at the top, which divides the space in the drying box into an airflow passage in the drying air duct and a drying cabin outside the drying air duct, wherein two groups of baffles are arranged in the middle of the drying air duct, wherein the baffles are valves that can be controlled to open and close, to adjust the flow direction of the airflow in the drying air duct, and two groups of air outlets are arranged in the middle of the drying air duct, through which the gas in the drying air duct is discharged into the structure cabin of the drying plate in the drying box.

[0012] Preferably, two groups of support frames are arranged in the drying structure cabin of the drying box, respectively on the inner side of the drying box and the outer side of the drying air duct, to provide support for the drying plate, and the middle of the drying plate is provided with a hollow hole to ensure the upward flow of the airflow, increase the contact area of the airflow and the grain drying, and improve the efficiency and quality of the drying, and the drying plate is provided with a discharge port below, which is a inclined circular sieve plate with a certain taper, which can ensure that the grain will slide down and realize the circulation of the grain on the multi-layer drying plate.

[0013] Preferably, a pressure pump is arranged in the upper baffle, which pressurizes the airflow above the drying air duct and discharges it through the middle air outlet, to perform secondary drying on the upper drying plate,

[0014] In addition, in order to avoid the excessive humidity of the secondary drying introduced gas, causing ineffective circulation, a dehumidifying component is arranged above the pressure pump to dehumidify the air passing through, improving the efficiency of subsequent circulation drying.

[0015] Preferably, the distribution structure of the two groups of support frames is different according to the corresponding number of layers, and the support frames include first support frames, second support frames, third support frames and fourth support frames, which are distributed in the inner side of the drying box and the outer side of the drying air duct from bottom to top, wherein the support frames are composed of a plurality of support blocks distributed at equal angles, which are used to support the drying plate.

[0016] Preferably, the first support frame is provided with two groups of sixteen support blocks at equal angles, the second support frame is provided with two groups of twelve support blocks at equal angles, the third support frame is provided with two groups of eight support blocks at equal angles, and the fourth support frame is provided with two groups of four support blocks at equal angles, and the other two groups are arranged at positions on the drying box and the drying air duct, which are staggered with each other, to better balance the support of the drying plate.

[0017] Preferably, the drying plate includes first drying plates, second drying plates, third drying plates and fourth drying plates, and the positions corresponding to the above groups of support blocks are provided with accommodation grooves, wherein the positions of the accommodation grooves correspond to the support blocks, and the size of the accommodation grooves is greater than that of the support blocks, which are used to provide accommodation, to facilitate the requirements of taking out and placing the multi-layer drying plate in turn.

[0018] Preferably, the first drying plate is angularly provided with two groups of twelve position slots, corresponding to the second support frame, which can be placed above the first support frame through the second support frame, the second drying plate is angularly provided with two groups of eight position slots, corresponding to the third support frame, which can be placed above the second support frame through the third support frame, the third drying plate is angularly provided with two groups of four position slots, corresponding to the third support frame, which can be placed above the third support frame through the third support frame, and the fourth drying plate is not provided with position slots and is placed above the fourth support frame. Through the above structural design, the first drying plate, the second drying plate, the third drying plate and the fourth drying plate can be placed above the first support frame, the second support frame, the third support frame and the fourth support frame in turn, realizing layered placement. The hollow structure in the plurality of drying plates forms an airflow channel from bottom to top in the drying cabin, which can realize multi-layer drying and improve efficiency.

[0019] Preferably, the opening and closing mode of the partition plate can form a plurality of different drying modes, which can adjust the drying efficiency of the grain in the drying plate of different layers. The lower partition plate is closed and the upper partition plate is opened. The airflow circulates in the direction of the arrow, and the second group of materials is subjected to two-group airflow superposition enhanced drying according to the positions of the partition plate and the air outlet. It is more targeted and can meet the drying needs at different stages.

[0020] Preferably, the drying box is provided with a drying cover plate at the upper end. The position where the drying cover plate contacts the drying box is provided with a sealing ring, which ensures the sealing property of the drying box. The middle part of the drying cover plate is provided with a pressure relief valve, which ensures safety when the pressure in the drying box exceeds the set value.

[0021] (Three) beneficial effects

[0022] 1. The drying plate is placed in the grain that needs to be dried. The structure of the drying plate and the drying air duct form a circulating airflow channel to dry the grain. The air in the drying air duct is discharged to the structure cabin of the drying plate in the drying box through the air outlet. The middle part of the drying plate is provided with a hollow hole to ensure the airflow to pass from bottom to top, increase the contact area of the airflow and the grain, and improve the drying efficiency and quality. The lower part of the drying plate is provided with a discharge port to realize the circulation of the grain in the multi-layer drying plate, improve the efficiency and increase the energy efficiency.

[0023] 2、The drying plate comprises a first drying plate, a second drying plate, a third drying plate and a fourth drying plate, and the positions corresponding to the plurality of groups of supporting blocks are provided with displacement grooves, wherein the positions of the displacement grooves correspond to the supporting blocks, the displacement grooves are larger than the supporting blocks in size, and the displacement grooves are used for providing displacement to facilitate the requirement that the multiple layers of drying plates are taken out and placed in sequence. Through the structural design of the multiple groups of drying plates and supporting frames, the first drying plate, the second drying plate, the third drying plate and the fourth drying plate can be placed above the first supporting frame, the second supporting frame, the third supporting frame and the fourth supporting frame in sequence, layering is realized, the hollow structure in the multiple groups of drying plates forms an airflow channel from bottom to top in the drying cabin, multiple layer drying is realized, and efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application and can be implemented according to the content of the specification, the following will be described in detail with the preferred embodiments of the present application and with the help of the drawings.

[0025] Figure 1 It is a front view of the present application of a hot air circulating dryer for grain;

[0026] Figure 2 It is a top view of the present application of a drying plate in a hot air circulating dryer for grain;

[0027] Figure 3 It is a top view of the present application of a first drying plate and a first supporting frame in a hot air circulating dryer for grain;

[0028] Figure 4 It is a top view of the present application of a second drying plate and a second supporting frame in a hot air circulating dryer for grain;

[0029] Figure 5 It is a top view of the present application of a third drying plate and a third supporting frame in a hot air circulating dryer for grain;

[0030] Figure 6 It is a top view of the present application of a fourth drying plate and a fourth supporting frame in a hot air circulating dryer for grain;

[0031] Figure 7 It is a airflow flow chart of the present application of a hot air circulating dryer for grain;

[0032] Figure 8 It is a side view of the present application of a drying plate in a hot air circulating dryer for grain.

[0033] Legend: 1, drying box; 2, drying pump; 3, drying air duct; 4, drying cover plate; 5, air outlet;

[0034] 6, drying plate; 61, first drying plate; 62, second drying plate; 63, third drying plate; 64, fourth drying plate;

[0035] 7, support frame; 71, first support frame; 72, second support frame; 73, third support frame; 74, fourth support frame;

[0036] 8, partition; 9, discharge port; 10, pressurizing pump. DETAILED DESCRIPTION

[0037] The embodiment of the present application provides a hot air circulation type grain dryer, solves the problems of low drying efficiency and single drying mode in the prior art, two groups of support frames 7 are arranged in a drying structure cabin of a drying box 1 and are arranged at the inner side of the drying box 1 and the outer side of a drying air duct 3, so as to provide support for drying plates 6, hollow holes are arranged in the middle of the drying plates 6, so as to ensure that air flows pass through from bottom to top, increase the contact area of air flow and grain drying, and improve the drying efficiency and quality.

[0038] Embodiment 1

[0039] The technical scheme in the embodiment of the present application is used for solving the problem of low drying efficiency, and the general idea is as follows:

[0040] As shown in Figure 1 Fig. 1, in view of the problems in the prior art, the utility model provides a hot air circulation type grain dryer, which comprises a drying box 1, the drying box 1 is a hollow cylindrical sealed cavity,

[0041] a drying mechanism, which comprises a drying pump 2, a drying air duct 3 and a drying plate 6, the drying pump 2 is arranged at the bottom of the drying box 1, the drying air duct 3 is arranged in the middle of the drying box 1, the air outlet of the drying pump 2 is connected with the drying air duct 3, so as to form a channel through which heat dissipation air flows enter, a plurality of groups of stacked drying plates 6 are arranged in the drying box 1, the grain to be dried is placed in the drying plate 6, a circulating air flow channel is formed by the structure of the drying air duct 3 and the drying plate 6, so as to dry the grain,

[0042] the drying air duct 3 is a cylindrical channel with an upper opening, the space in the drying box 1 is divided into an air flow channel in the drying air duct 3 and a drying cabin outside the drying air duct 3, two groups of partitions 8 are arranged in the middle of the drying air duct 3, the lower partition 8 adjusts the flow direction of air flow in the drying air duct 3, two groups of air outlets 5 are further arranged in the middle of the drying air duct 3, air in the drying air duct 3 is guided out to the structure cabin of the drying plate 6 in the drying box 1 through the air outlets 5,

[0043] In summary Figure 7As shown, a pressure pump 10 is also installed in the upper partition 8. The pressure pump 10 pressurizes the airflow above the drying air duct 3 and then discharges it through the air outlet 5 in the middle to circulate and dry the upper drying plate a second time.

[0044] In addition, to prevent excessive humidity in the air introduced for secondary drying, which would result in ineffective circulation, a dehumidification component is installed above the pressure pump 10 to dehumidify the passing air and improve the efficiency of subsequent circulating drying.

[0045] like Figures 2-6 As shown, two sets of support frames 7 are installed in the drying structure chamber of the drying box 1, respectively located inside the drying box 1 and outside the drying air duct 3, to provide support for the drying plate 6. The drying plate 6 has a perforated hole in the middle to ensure that the airflow passes through from bottom to top, increasing the contact area between the airflow and the grain drying process, and improving the drying efficiency and quality.

[0046] like Figure 8 As shown, a discharge port 9 is provided below the drying plate 6 to facilitate the flow of grain through the multi-layer drying plate 6. The drying plate 6 is an inclined circular sieve plate with a certain taper, which ensures that the grain will slide off.

[0047] The distribution structure of the two sets of support frames 7 varies depending on the number of layers. Each support frame 7 includes a first support frame 71, a second support frame 72, a third support frame 73, and a fourth support frame 74, distributed from bottom to top inside the drying chamber 1 and outside the drying air duct 3. Each support frame 7 is composed of multiple support blocks arranged at equal angles to support the drying plate 6. The first support frame 71 has two sets of sixteen support blocks arranged at equal angles; the second support frame 72 has two sets of twelve support blocks arranged at equal angles; the third support frame 73 has two sets of eight support blocks arranged at equal angles; and the fourth support frame 74 has two sets of four support blocks arranged at equal angles. The other two sets are staggered on the drying chamber 1 and the drying air duct 3, providing better balance and support for the drying plate 6.

[0048] The drying plate 6 comprises a first drying plate 61, a second drying plate 62, a third drying plate 63 and a fourth drying plate 64, and the positions corresponding to the above groups of supporting blocks are provided with allowing grooves, wherein the positions of the allowing grooves correspond to the supporting blocks, the allowing grooves are larger than the supporting blocks in size, and are used for providing allowing, so as to facilitate the requirements of sequentially taking out and placing the multiple layers of drying plates 6, the first drying plate 61 is provided with two groups of twelve allowing grooves at equal angles, corresponds to the second supporting frame 72, and can be placed above the first supporting frame 71 through the second supporting frame 72, the second drying plate 62 is provided with two groups of eight allowing grooves at equal angles, corresponds to the third supporting frame 73, and can be placed above the second supporting frame 72 through the third supporting frame 73, the third drying plate 63 is provided with two groups of four allowing grooves at equal angles, corresponds to the third supporting frame 73, and can be placed above the third supporting frame 73 through the third supporting frame 73, and the fourth drying plate 64 is not provided with allowing grooves and is placed above the fourth supporting frame 74, through the above structural design, the first drying plate 61, the second drying plate 62, the third drying plate 63 and the fourth drying plate 64 can be sequentially placed above the first supporting frame 71, the second supporting frame 72, the third supporting frame 73 and the fourth supporting frame 74, and the layered placement is realized, and the hollow structure in the multiple groups of drying plates 6 forms an airflow channel from bottom to top in the drying cabin, so that multiple layers of drying can be realized and the efficiency is improved.

[0049] In use, the opening and closing mode of the partition plate 8 can form multiple different drying modes, the drying efficiency of the grain in the drying plate 6 with different layers is adjusted,

[0050] As shown in the figure, Figure 7 the lower partition plate 8 is closed, the upper pressurizing pump 10 is opened, the airflow circulates in the direction of the arrow, and the second group of materials is subjected to two-group airflow superposition strengthening drying according to the positions of the partition plate 8 and the air outlet 5, the targetedness is stronger, and the drying requirements in different stages can be met.

[0051] The drying cabinet 1 is provided with a drying cover plate 4 at the upper end, the position where the drying cover plate 4 contacts the drying cabinet 1 is provided with a sealing ring, the sealing ring is used for guaranteeing the sealing property of the drying cabinet 1, and the middle part of the drying cover plate 4 is provided with a pressure relief valve, when the pressure in the drying cabinet 1 exceeds a set value, the pressure relief guarantees safety.

[0052] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the utility model and are not limitations on the embodiments. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A hot air circulating dryer for grain, characterized in that: Drying box (1), wherein the drying box (1) is a hollow cylindrical sealed cavity, The drying mechanism includes a drying pump (2), a drying air duct (3), and a drying plate (6). The drying pump (2) is located at the bottom of the drying box (1). The drying air duct (3) is located in the middle of the drying box (1). The air outlet of the drying pump (2) is connected to the drying air duct (3). Several sets of stacked drying plates (6) are arranged inside the drying box (1). The drying air duct (3) combined with the drying plate (6) forms a circulating airflow channel for grain drying.

2. The hot air circulating dryer for grain as described in claim 1, characterized in that: The drying air duct (3) is a cylindrical channel with an opening at the top, which divides the space in the drying box (1) into an airflow channel inside the drying air duct (3) and a drying chamber outside the drying air duct (3). Two sets of partitions (8) are provided in the middle of the drying air duct (3), and the partitions (8) are valves that can be controlled to open and close. Two sets of air outlets (5) are also provided in the middle of the drying air duct (3), through which the gas in the drying air duct (3) is discharged into the drying chamber of the drying plate (6) inside the drying box (1).

3. A hot air circulating dryer for grain as described in claim 2, characterized in that: The drying chamber (1) is provided with two sets of support frames (7), which are respectively located inside the drying chamber (1) and outside the drying air passage (3). The drying plate (6) is an inclined circular sieve plate with a certain taper. The discharge port (9) is provided below the drying plate (6).

4. A hot air circulating dryer for grain as described in claim 3, characterized in that: A pressure pump (10) is also installed in the upper partition (8). The airflow above the drying air duct (3) is pressurized by the pressure pump (10) and then discharged through the air outlet (5) in the middle. A dehumidification component is installed above the pressure pump (10).

5. A hot air circulating dryer for grain as described in claim 4, characterized in that: The distribution structure of the two sets of support frames (7) is different depending on the number of distribution layers. The support frame (7) includes a first support frame (71), a second support frame (72), a third support frame (73) and a fourth support frame (74), which are distributed from bottom to top on the inside of the drying box (1) and the outside of the drying air duct (3). The support frame (7) is composed of multiple support blocks distributed at equal angles to support the drying plate (6).

6. A hot air circulating dryer for grain as described in claim 5, characterized in that: The first support frame (71) has two sets of sixteen support blocks at equal angles, the second support frame (72) has two sets of twelve support blocks at equal angles, the third support frame (73) has two sets of eight support blocks at equal angles, the fourth support frame (74) has two sets of four support blocks at equal angles, and the other two sets are respectively set on the drying box (1) and the drying air duct (3) in staggered positions.

7. A hot air circulating dryer for grain as described in claim 6, characterized in that: The drying plate (6) includes a first drying plate (61), a second drying plate (62), a third drying plate (63) and a fourth drying plate (64).

8. A hot air circulating dryer for grain as described in claim 7, characterized in that: The first drying plate (61) is provided with two sets of twelve clearance slots at equal angles, corresponding to the second support frame (72), and can be placed above the first support frame (71) through the second support frame (72). The second drying plate (62) is provided with two sets of eight clearance slots at equal angles, corresponding to the third support frame (73), and can be placed above the second support frame (72) through the third support frame (73). The third drying plate (63) is provided with two sets of four clearance slots at equal angles, corresponding to the third support frame (73), and can be placed above the third support frame (73) through the third support frame (73). The fourth drying plate (64) is not provided with clearance slots and is placed above the fourth support frame (74). The clearance slots are provided at the corresponding positions of the above multiple sets of support blocks, wherein the position of the clearance slots corresponds to the support blocks, and the size of the clearance slots is larger than that of the support blocks.

9. A hot air circulating dryer for grain as described in claim 1, characterized in that: The upper end of the drying box (1) is provided with a drying cover plate (4), and a sealing ring is provided at the position where the drying cover plate (4) contacts the drying box (1).

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