Grain drying device

Abstract

The invention provides a grain drying device, relates to the field of grain drying equipment, and aims to solve the problems of high hot air resistance, high fan energy consumption and high grain drying cost due to the fact that inlet air adopts one-in and one-out downstream flow or countercurrent flow in the conventional grain drying process. In order to solve the problems of low tempering frequency, low drying efficiency and poor grain quality due to adoption of a mixed flow mode in the existing grain drying process, three adjacent rows of corner boxes are adopted as a group, the middle row of corner boxes in the same group forms an air inlet channel, the upper row and the lower row of corner boxes in the same group are exhaust channels, and the thickness of a grain layer between the adjacent rows of corner boxes is reduced, so that the wind resistance is reduced, and the grain quality is improved. A tempering area is formed between every two adjacent corner combining boxes, multiple times of tempering of the grains are achieved, heat is transferred from outside to inside, moisture is transferred from inside to outside more sufficiently, and therefore the quality of the dried grains is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of grain drying equipment, and in particular to a grain drying device. Background Art

[0002] The grain drying tower corner box is an internal component of the grain drying tower. Usually, an air inlet corner box with a pentagonal cross-section is used for air distribution, so that the hot air and the grain flow in the same direction to achieve downstream drying, or the hot air and the grain flow in the opposite direction to achieve countercurrent drying. The slow-suction area is a working section in the internal structure of the grain drying tower that does not send hot air (a small amount of cold air can also be input). It is maintained for a certain period of time, so that the moisture inside the grain diffuses outward and reduces the moisture gradient inside and outside; at the same time, the heat diffuses from the outside of the grain to the inside, reducing the temperature gradient inside and outside. In this process, the rice is also slowly precipitating water.

[0003] A Chinese patent (publication number: CN 221036656 U) discloses a grain drying tower corner box, which can cooperate with the blown hot air through the corner box body and the exhaust screen holes, so that conventional air distribution can be carried out to achieve downstream drying air supply processing, and the outer wall of the corner box body is cleaned by electric means. Compared with traditional manual cleaning, electric cleaning is not only simple and convenient to operate, but also time-saving and labor-saving, and greatly reduces the labor intensity of workers. However, it does not consider the layout of the slow recovery area. In the current grain drying tower, the slow recovery area is set in a small number. After continuous drying of multiple layers of corner boxes, it will enter the slow recovery area, which is prone to the problem of insufficient dryness inside the grain and uneven distribution of grain moisture, affecting the quality of the grain after drying. Summary of the invention

[0004] The purpose of the present invention is to provide a grain drying device in view of the defects of the prior art, in which three adjacent rows of corner boxes are grouped together, the middle row of the corner boxes in the same group forms an air intake channel, and the upper row and the lower row are both exhaust channels, thereby reducing the thickness of the grain layer between adjacent rows of corner boxes, thereby reducing wind resistance, and forming a slow-warming zone between adjacent groups of corner boxes to achieve multiple slow-warming of the grain, so that heat is transferred from the outside to the inside and moisture is transferred from the inside to the outside more fully, thereby ensuring the quality of the grain after drying.

[0005] In order to solve the above problems, the following solutions are adopted:

[0006] A grain drying device, comprising:

[0007] The shell has a drying chamber formed inside for accommodating grains;

[0008] An air inlet corner box is installed on the shell, and an air inlet passage connected to the drying chamber is formed inside the air inlet corner box;

[0009] The exhaust corner boxes are installed on the shell and distributed above and below the air inlet corner boxes, and an exhaust channel connected to the drying chamber is formed inside the exhaust corner boxes; the air inlet corner box and the exhaust corner boxes adjacent to it above and below form a group of corner boxes, and the air inlet channel is connected to the exhaust channel above it and the exhaust channel below it respectively through the drying chamber; in the direction of grain flow, multiple groups of corner boxes are installed on the shell, and a slow recovery zone is formed between adjacent groups of corner boxes.

[0010] Furthermore, a part of the intake airflow obtained by the intake corner box enters the exhaust corner box located at the upper part of the same group in the opposite direction of the grain flow, and another part of the intake airflow obtained by the intake corner box enters the exhaust corner box located at the lower part of the same group in the same direction of the grain flow.

[0011] Furthermore, one end of the air intake corner box is blocked and the other end is open, an air intake channel is formed between the two ends of the air intake corner box, and the open end of the air intake corner box serves as an entrance to the air intake channel; one end of the exhaust corner box is blocked and the other end is open, an exhaust channel is formed between the two ends of the exhaust corner box, and the open end of the exhaust corner box serves as an outlet of the exhaust channel.

[0012] Furthermore, the inlet of the air intake passage and the outlet of the air exhaust passage are located on different sides of the shell.

[0013] Furthermore, the bottom of the air intake corner box is open to serve as an outlet of the air intake passage; the bottom of the air exhaust corner box is open to serve as an inlet of the air exhaust passage.

[0014] Furthermore, in the grain flow direction, adjacent groups of corner boxes are spaced apart.

[0015] Furthermore, the same group of corner boxes includes multiple air intake corner boxes and multiple exhaust corner boxes, the multiple air intake corner boxes are spaced apart in sequence along the horizontal direction to form a row, and the multiple exhaust corner boxes are spaced apart in sequence along the horizontal direction to form two rows, and the air intake corner box is located between the two rows of exhaust corner boxes in the same group.

[0016] Furthermore, the air intake corner box and the exhaust corner box are staggered in the horizontal direction, or the air intake corner box and the exhaust corner box are spatially cross-distributed.

[0017] Furthermore, the air inlet corner boxes corresponding to adjacent groups of corner boxes are staggered in the horizontal direction.

[0018] Furthermore, the vertical cross-sections of the air intake corner box and the exhaust corner box are pentagonal, and the tops of the air intake corner box and the exhaust corner box form pointed ends respectively.

[0019] Compared with the prior art, the present invention has the following advantages and positive effects:

[0020] (1) In view of the problems that the current grain drying process uses a one-in-one-out cocurrent or countercurrent air intake, which results in large hot air resistance, high fan energy consumption, and high grain drying cost; and the current grain drying process uses a mixed flow method, which results in a small number of slow revival times, low drying efficiency, and poor grain quality, three adjacent rows of corner boxes are used as a group. The middle row of the same group of corner boxes forms an air intake channel, and the upper and lower rows are exhaust channels. The thickness of the grain layer between adjacent rows of corner boxes is reduced, thereby reducing wind resistance, reducing fan power consumption, and reducing grain drying costs. A slow revival zone is formed between adjacent groups of corner boxes to achieve multiple slow revival of the grain, and heat is more fully transferred from the outside to the inside, thereby ensuring the quality of the grain after drying.

[0021] (2) The corner box adopts bottom air outlet and return air to reduce the impact of the grain accumulated in the drying chamber on the air intake and exhaust. Combined with the one-inlet and two-outlet corner box arrangement, the wind resistance of the air flow in the grain layer is reduced, which reduces the power consumption of the fan and reduces the cost of grain drying.

[0022] (3) The staggered arrangement of the corner boxes of the corresponding air inlet channels of adjacent groups allows the grain to be in uniform contact with each group of high-temperature air inlet corner boxes, making the moisture content of the grain more uniform after drying. In addition, the staggered arrangement of high-temperature air inlet corner boxes can avoid continuous scalding of grain in a single area, thus ensuring the quality of the grain after drying. In addition, compared with the drying method of two rows of air inlet and one row of air outlet, the number of rows of air inlet corner boxes is reduced, thereby reducing the number of corner boxes on the high-temperature surface and reducing the scalding of the grain by the corner box surface.

[0023] (4) Multiple groups of corner boxes are set up along the direction of grain flow, and a slow-heat zone is formed between adjacent groups of corner boxes, so that the grain can be dried within the distribution area of ​​the same group of corner boxes, reducing the moisture content of the grain. The slow-heat zone is used for slow-heating, so that the moisture content of the grain diffuses from the inside to the outside, and the heat is transferred from the outside to the inside more fully. Drying and slow-heating are operated alternately to improve the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 This is a schematic diagram of a grain drying device in Example 1 of the present invention.

[0026] Figure 2 It is a cross-sectional schematic diagram of the grain drying device in Example 1 of the present invention.

[0027] Figure 3 This is a schematic diagram of another corner box arrangement of the grain drying device in Example 1 of the present invention.

[0028] Figure 4It is a cross-sectional schematic diagram of another corner box arrangement of the grain drying device in Example 1 of the present invention.

[0029] In the figure, 1. Intake corner box, 2. Exhaust corner box, 3. Slow-down area, 4. Downstream airflow, 5. Countercurrent airflow, 6. Intake airflow, 7. Exhaust airflow, 8. Shell. DETAILED DESCRIPTION

[0030] Example 1

[0031] In a typical embodiment of the present invention, Figure 1-Figure 4 As shown, a grain drying device is provided.

[0032] The current grain drying tower is equipped with fewer slow recovery areas 3, resulting in a short slow recovery time. After passing through multiple layers of corner boxes for continuous drying, the short slow recovery time is difficult to meet the requirements of uniform moisture and heat distribution inside the grain, affecting the quality of the grain after drying. In addition, other forms of drying towers have the problem of thick dried grain layer and large wind resistance. Based on this, the present embodiment provides a grain drying device, which is equipped with multiple groups of corner boxes. Each group of corner boxes adopts a row of air intake corner boxes 1 and two rows of exhaust corner boxes 2. A slow recovery area 3 is formed between adjacent groups of corner boxes, so that drying and slow recovery are performed alternately, thereby improving the uniformity of grain moisture distribution and transferring heat from outside to inside more fully, thereby ensuring the quality of the grain after drying. At the same time, a one-in and two-out corner box arrangement is adopted, which increases the density of the corner box arrangement, makes the dried grain layer thinner, reduces wind resistance, reduces the consumption of fan power, and reduces the cost of grain drying.

[0033] like Figure 1 As shown, the grain drying device mainly includes a shell 8 and corner boxes installed on the shell 8. The shell 8 serves as the main structure of the entire grain drying device. Multiple groups of corner boxes are respectively installed on the shell 8. Taking the example of grain flowing from top to bottom for drying, the multiple groups of corner boxes are arranged in sequence along the vertical direction.

[0034] The shell 8 has an internal drying chamber for accommodating the grain to be dried. The shell 8 is the main structure of the grain drying device, which provides the space environment required for grain drying and can carry the corner box. It ensures that the grain can be dried in a closed and controllable environment to avoid the influence of the external environment on the drying process.

[0035] An air inlet corner box 1 is installed on the housing 8. An air inlet channel connected to the drying chamber is formed inside the air inlet corner box 1. Dry hot air is introduced through the air inlet channel to ensure that the hot air can enter the drying chamber evenly and efficiently, exchange heat with the grain and take away the moisture discharged from the grain. This improves the utilization rate of the hot air, speeds up the drying speed of the grain, and reduces the increase in energy consumption caused by excessive wind resistance.

[0036] Exhaust corner boxes 2 are installed above and below the air inlet corner box 1, and an exhaust passage connected to the drying chamber is formed inside the exhaust corner box 2. The exhaust corner box 2 and the air inlet corner box 1 together form a set of corner boxes to achieve the circulation of hot air. The air inlet corner box 1 is located in the middle row of three adjacent rows of corner boxes as the main air inlet structure, and the exhaust corner box 2 is located in the upper row and the lower row of three adjacent rows of corner boxes as the main exhaust structure. The hot and humid air after the grain heat exchange is discharged from the drying chamber through the exhaust passage.

[0037] like Figure 1 and Figure 2 As shown, in the direction of grain flow, the shell 8 is equipped with multiple groups of corner boxes, and each group of corner boxes is composed of an air intake corner box 1 and exhaust corner boxes 2 above and below the air intake corner box 1. A slow recovery zone 3 is formed between adjacent groups of corner boxes. Through the setting of the slow recovery zone 3, the grain can undergo multiple slow recovery during the drying process, that is, the drying process is suspended to allow the moisture and heat inside the grain to be redistributed to achieve a more uniform drying effect. The quality of the grain after drying is improved, and the problems of excessive grain drying, quality degradation, discoloration, etc. caused by continuous drying are reduced. At the same time, the setting of the slow recovery zone 3 also optimizes the drying process and improves the drying efficiency. The drying process of multi-layer drying plus multi-layer slow recovery is more suitable for the drying of grain crops such as wheat, corn, rice, and sorghum.

[0038] like Figure 1 As shown, the intake airflow 6 obtained by the intake corner box 1 is divided into two parts, one part enters the exhaust corner box 2 located at the upper part of the same group in the opposite direction of the grain flow, that is, flows from bottom to top, as the countercurrent airflow 5, and the other part enters the exhaust corner box 2 located at the lower part of the same group in the same direction of the grain flow, that is, flows from top to bottom, as the downstream airflow 4. By controlling the flow direction of the intake airflow 6, the hot air can penetrate the grain layer more evenly. At the same time, compared with the one-in-one-out method, the thickness of the airflow passing through the grain layer can be halved, thereby reducing wind resistance, reducing the consumption of fan power, and reducing the cost of grain drying.

[0039] like Figure 2 As shown, one end of the air inlet corner box 1 and the air exhaust corner box 2 is blocked, and the other end is open, forming an air inlet channel and an air exhaust channel. The open end of the air inlet corner box 1 serves as the entrance of the air inlet channel, and the open end of the air exhaust corner box 2 serves as the outlet of the air exhaust channel, and the internal exhaust airflow 7 is discharged to the outside. It ensures that the hot air can smoothly enter and exit the drying chamber, and at the same time prevents the hot air from forming vortices or short circuits inside the corner box, which affects the drying effect.

[0040] The inlet of the air inlet channel and the outlet of the exhaust channel are located on the opposite sides of the housing 8. This prevents the hot air from forming a short circuit in the drying chamber, ensuring that the hot air can fully exchange heat with the grain. This improves the utilization rate of the hot air, speeds up the drying speed, and reduces the energy waste caused by the hot air short circuit.

[0041] The bottoms of the air inlet corner box 1 and the exhaust corner box 2 are open, serving as the outlet of the air inlet channel and the entrance of the exhaust channel respectively, so that the hot air can act more directly on the bottom of the grain layer, the hot air has stronger penetration in the grain layer, the drying effect is more uniform, and the overall quality of the grain after drying is improved.

[0042] like Figure 2 As shown in the figure, in the grain flow direction, the adjacent groups of corner boxes are spaced apart to provide a slow recovery area 3 for the grain, so that the grain can experience multiple slow recovery during the drying process, achieving a more uniform drying effect. The quality of the grain after drying is improved, and the problems of grain quality degradation, cracks, discoloration, etc. caused by excessive and uneven drying are reduced.

[0043] The same group of corner boxes includes multiple air intake corner boxes 1 and multiple exhaust corner boxes 2, which are distributed in sequence along the horizontal direction. The air intake corner boxes 1 at the same horizontal position are as a row, and the exhaust corner boxes 2 at the same horizontal position are as a row. The same group of corner boxes is a multi-row structure.

[0044] like Figure 1 and Figure 2 As shown, the air inlet corner box 1 and the exhaust corner box 2 are arranged in a staggered manner in the horizontal direction, and the distribution directions of the air inlet corner box 1 and the exhaust corner box 2 are parallel. The air inlet corner boxes 1 corresponding to the adjacent groups of corner boxes are also arranged in a staggered manner. Through the staggered arrangement of the air inlet corner box and the air outlet corner box, the hot air is fully in contact with the grain, and the utilization rate of the hot air is improved. The distribution of the hot air in the drying chamber is more uniform, and the drying effect is more consistent. In addition, the staggered high-temperature air inlet corner boxes 1 can avoid continuous scalding of grain in a single area, ensuring the quality of the grain after drying.

[0045] In other optional embodiments, the air intake corner boxes and the exhaust corner boxes are spatially cross-distributed. Figure 3 and Figure 4 As shown, the distribution direction of the air inlet corner box 1 and the exhaust corner box 2 is vertical in space. The horizontal cross-section of the shell 8 is rectangular, and the shell 8 includes two pairs of opposite sides, one pair of opposite sides is equipped with the air inlet corner box 1, and the other pair of opposite sides is equipped with the exhaust corner box 2. The flow path of the hot air in the drying tower becomes more complex and diversified, which helps to distribute the hot air more evenly in the grain layer, reduce local overheating or insufficient drying, and thus improve the consistency of the drying effect.

[0046] The vertical cross-sections of the air inlet corner box 1 and the air outlet corner box 2 are pentagonal, with a pointed tip at the top, so as to realize the diversion of grains and reduce the direct impact force of grains on the air inlet corner box 1 and the air outlet corner box 2.

[0047] It is understandable that the air intake corner box 1 and the exhaust corner box 2 can also be used as follows Figure 3 and Figure 4 The structure shown in Figure 3 and Figure 4In the figure, the vertical cross-sections of the air intake corner box 1 and the exhaust corner box 2 are pentagonal, and the side panels on both sides of the corner boxes are vertically distributed.

[0048] Compared with the traditional one-in-one-out countercurrent exhaust or cocurrent exhaust drying process, this embodiment combines the one-in-two-out corner box arrangement to reduce the wind resistance of the airflow in the grain layer, jointly reduce the consumption of fan power, and reduce the grain drying cost. It solves the problems of large wind resistance and high energy consumption in traditional drying devices, and achieves significant results such as improving drying efficiency, ensuring grain quality, and reducing energy consumption.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grain drying device, characterized in that: include: The shell has a drying chamber formed inside for accommodating grains; An air inlet corner box is installed on the shell, and an air inlet passage connected to the drying chamber is formed inside the air inlet corner box; The exhaust corner boxes are installed on the housing and distributed above and below the air inlet corner boxes. An exhaust passage connected to the drying chamber is formed inside the exhaust corner boxes. The air inlet corner boxes and the exhaust corner boxes adjacent to the air inlet corner boxes above and below the exhaust corner boxes form a group of corner boxes. The air inlet passages are connected to the exhaust passages above and below the exhaust passages respectively through the drying chamber. In the direction of grain flow, the shell is equipped with multiple groups of corner boxes, and a slow recovery zone is formed between adjacent groups of corner boxes.

2. The grain drying device according to claim 1, characterized in that: A part of the intake airflow obtained by the intake angle box enters the exhaust angle box located at the upper part of the same group in the opposite direction of the grain flow, and another part of the intake airflow obtained by the intake angle box enters the exhaust angle box located at the lower part of the same group in the same direction of the grain flow.

3. The grain drying device according to claim 1 or 2, characterized in that: One end of the air inlet corner box is blocked and the other end is open, an air inlet channel is formed between the two ends of the air inlet corner box, and the open end of the air inlet corner box serves as the entrance of the air inlet channel; one end of the exhaust corner box is blocked and the other end is open, an exhaust channel is formed between the two ends of the exhaust corner box, and the open end of the exhaust corner box serves as the outlet of the exhaust channel.

4. The grain drying device according to claim 3, characterized in that: The inlet of the intake passage and the outlet of the exhaust passage are located on different sides of the housing.

5. The grain drying device according to claim 4, characterized in that: The bottom of the air inlet corner box is open, serving as the outlet of the air inlet passage; the bottom of the air exhaust corner box is open, serving as the inlet of the air exhaust passage.

6. The grain drying device according to claim 1, characterized in that: In the direction of grain flow, adjacent groups of corner boxes are spaced apart.

7. The grain drying device according to claim 1, characterized in that: The same group of corner boxes includes multiple air intake corner boxes and multiple exhaust corner boxes. The multiple air intake corner boxes are spaced apart in sequence in the horizontal direction to form a row, and the multiple exhaust corner boxes are spaced apart in sequence in the horizontal direction to form two rows. The air intake corner box is located between the two rows of exhaust corner boxes in the same group.

8. The grain drying device according to claim 1, characterized in that: The air intake corner box and the exhaust corner box are arranged staggered in the horizontal direction.

9. The grain drying device according to claim 6, 7 or 8, characterized in that: The air inlet corner boxes corresponding to the adjacent groups of corner boxes are staggered in the horizontal direction, or the air inlet corner boxes and the exhaust corner boxes are spatially cross-distributed.

10. The grain drying device according to claim 9, characterized in that: The vertical cross-sections of the air intake corner box and the exhaust corner box are pentagonal, and the tops of the air intake corner box and the exhaust corner box form tips respectively.

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