A grain drying tower based on heat pump

Abstract

The utility model discloses a grain drying tower based on a heat pump, comprising: an outer tower, provided with a feed inlet at the top, a discharge outlet at the bottom and a cold air outlet; an inner tower, arranged inside a drying section and fixedly connected to the outer tower, provided with a hot air inlet at the bottom and a hot air outlet at the top, the hot air outlet being located directly below the feed inlet; a centrifugal fan, rotatably mounted on the hot air outlet around a vertical axis, for rotating when driven by rising hot air to radially discharge the hot air; a centrifugal material distribution plate, fixedly connected to the centrifugal fan and covering the top of the centrifugal fan, for throwing the grains falling from the feed inlet above itself to the inner wall of the outer tower by centrifugal force when rotating. The power generated by the rising hot air drives the centrifugal material distribution plate located at the grain drop position to rotate, so that the grains are evenly thrown between the outer tower and the inner tower by the centrifugal force, thereby solving the problem of uneven distribution of grains inside a cylindrical drying chamber.

Description

Technical Field

[0001] The utility model relates to the field of drying towers, in particular to a grain drying tower based on a heat pump. Background Art

[0002] The conventional modular tower dryer comprises two tower bodies, one outer and one inner, and the interlayer between the two tower bodies forms a cylindrical drying chamber, in which the grains flow downward, so that the grains are gradually dried.

[0003] Since the grains fall freely by gravity inside the drying chamber, if the grains are unevenly distributed when entering the top of the drying chamber, the grains will be unevenly distributed inside the drying chamber during the entire falling process, thus affecting the drying quality of the grains. Utility Model Content

[0004] The utility model aims to provide a grain drying tower based on a heat pump to solve the problem of uneven distribution of grains inside a cylindrical drying chamber.

[0005] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0006] A grain drying tower based on a heat pump comprises: an outer tower, provided with a feed inlet at the top, a feed outlet and a cold air outlet at the bottom; an inner tower, arranged inside a drying section and fixedly connected to the outer tower, a grain drying chamber being formed between the outer tower and the inner tower, the inner tower being provided with a hot air inlet at the bottom and a hot air outlet at the top, the hot air outlet being located directly below the feed inlet; a centrifugal fan rotatably mounted around a vertical axis at the hot air outlet, for rotating when driven by rising hot air to radially discharge the hot air; a centrifugal distributing plate, fixedly connected to the centrifugal fan and covering the top of the centrifugal fan, for throwing grains falling from the feed inlet above the inner tower to the inner wall of the outer tower by centrifugal force when rotating.

[0007] Furthermore, the outer tower also includes a storage chamber arranged below the inner tower, the discharge port is arranged at the bottom of the storage chamber, and the cold air outlet is arranged between the drying chamber and the storage chamber.

[0008] Furthermore, the hot air inlet is connected to the hot air supply side of the heat pump through a hot air pipe running through the outer tower, and the cold air outlet is connected to the cold air discharge side of the heat pump through a cold air pipe.

[0009] Furthermore, the diameter of the hot air outlet is smaller than the diameter of the inner tower, so that the hot air is accelerated when passing through the hot air outlet to form a high-speed airflow that is sprayed onto the centrifugal fan.

[0010] Furthermore, a plurality of diverter plates are provided between the outer tower and the inner tower, and the diverter plates are fixedly connected to one of the outer tower and the inner tower. A plurality of the diverter plates are evenly distributed around the axis of the inner tower to form a diverter, and a guide groove inclined to the axis of the drying chamber is formed between two adjacent diverter plates.

[0011] Furthermore, the plurality of flow dividers are evenly distributed along the vertical direction.

[0012] Furthermore, the diverter plate includes a first plate, a second plate, and a third plate sequentially connected from top to bottom, wherein the first plate and the third plate are vertical, and the second plate is inclined.

[0013] Compared with the prior art, this application has the following beneficial effects:

[0014] Provided is a grain drying tower based on a heat pump, which uses the power generated by rising hot air to drive a centrifugal distribution plate located at the grain drop point to rotate, so that the grain is evenly thrown between an outer tower and an inner tower by centrifugal force. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] Figure 1 It is a front view of an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Cross-sectional view in the AA direction;

[0018] Figure 3 for Figure 1 Cross-sectional view in the BB direction;

[0019] Figure 4 It is a three-dimensional diagram of an embodiment of the utility model, in which the outer tower is in a perspective state;

[0020] The numbers in the figure represent the following:

[0021] 1-outer tower; 11-feeding port; 12-discharging port; 13-cold air outlet; 14-storage chamber; 15-cold air duct; 2-inner tower; 21-hot air inlet; 22-hot air outlet; 23-hot air duct; 3-centrifugal fan; 31-centrifugal distributing plate; 4-drying chamber; 5-diverter; 51-diverter plate; 511-first plate; 512-second plate; 513-third plate; 52-guide trough. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The following provides a grain drying tower based on a heat pump. Figure 1 This is the main view of the grain drying tower. Figure 2 yes Figure 1 The cross-sectional view in the AA direction, Figure 3 yes Figure 1 Cross-sectional view along the BB direction.

[0024] Combination Figure 1 , Figure 2 , Figure 3 , grain drying tower includes:

[0025] The outer tower 1 has a feed inlet 11 at the top, a discharge port 12 at the bottom, and a cold air outlet 13;

[0026] The inner tower 2 is arranged inside the drying section and fixedly connected to the outer tower 1, and has a hot air inlet 21 at the bottom and a hot air outlet 22 at the top, and the hot air outlet 22 is located directly below the feed inlet 11;

[0027] A centrifugal fan 3 is rotatably mounted around a vertical axis at the hot air outlet 22, and is used to rotate when driven by the rising hot air to discharge the hot air radially;

[0028] The centrifugal material distribution plate 31 is fixedly connected to the centrifugal fan 3 and covers the top of the centrifugal fan 3. When rotating together with the centrifugal fan 3, the centrifugal distribution plate 31 throws the grains falling from the feed inlet 11 onto the inner wall of the outer tower 1 through the centrifugal force.

[0029] The working principle of the grain drying tower of the present embodiment is:

[0030] The annular gap formed between the outer tower 1 and the inner tower 2 is the drying chamber 4 for the grains. The grains enter the interior of the grain drying tower from the feed port 11, and then flow downward along the drying chamber 4. A storage chamber 14 is also provided at the bottom of the outer tower 1, where the dried grains are accumulated. The storage chamber 14 is located below the inner tower 2, the discharge port 12 is provided at the bottom of the storage chamber 14, and the cold air outlet 13 is provided between the drying chamber 4 and the storage chamber 14.

[0031] The hot air inlet 21 is connected to the hot air supply side of the heat pump through a hot air pipe 23 that runs through the outer tower 1, and the cold air outlet 13 is connected to the cold air discharge side of the heat pump through the cold air pipe 15. The dry hot air enters the interior of the inner tower 2 from the hot air inlet 21, and then moves upward along the inner tower 2. The diameter of the hot air outlet 22 is smaller than the diameter of the inner tower 2, and the dry hot air accelerates here. The dry hot air rushing out of the hot air outlet 22 is sprayed on the centrifugal fan 3, so that the centrifugal fan 3 and the centrifugal distributing plate 31 rotate as a whole. After the hot air hits the bottom wall of the centrifugal distributing plate 31, it moves radially around and then enters the drying chamber 4. Then the hot air and grains flow downward along the drying chamber 4, the grains are dried here, and the dry hot air gradually forms warm and humid air. When passing through the cold air outlet 13, the grains continue to fall to the storage chamber 14, and the warm and humid air is discharged to the cold air discharge side of the heat pump through the cold air pipe 15, so that the residual heat of the warm and humid air is recovered and utilized by the heat pump.

[0032] Figure 4 A three-dimensional diagram of a grain drying tower is shown, in which the outer tower 1 is transparent.

[0033] Furthermore, in order to slow down the speed at which the grains fall along the drying chamber 4 and prolong the drying time, a plurality of diverter plates 51 are arranged between the outer tower 1 and the inner tower 2. The diverter plates 51 are fixedly connected to one of the outer tower 1 and the inner tower 2. A plurality of diverter plates 51 are evenly distributed around the axis of the drying chamber 4 to form a diverter 5. A guide groove 52 inclined to the axis of the drying chamber 4 is formed between two adjacent diverter plates 51. The grains flow obliquely inside the guide groove 52, thereby slowing down their own falling speed and prolonging the drying time.

[0034] Furthermore, when the grains inside the drying chamber 4 are unevenly distributed, an accumulation is formed on the top of a portion of the guide grooves 52 , so that the grains are diverted to other guide grooves 52 , thereby redistributing the grains evenly.

[0035] Furthermore, the plurality of diverters 5 are evenly distributed along the vertical direction, and the diverter plate 51 includes a first plate 511, a second plate 512, and a third plate 513 sequentially connected from top to bottom, wherein the first plate 511 and the third plate 513 are vertical, and the second plate 512 is inclined.

[0036] This design enables the grains and hot dry air to flow obliquely along the two adjacent second plates 512 inside the guide groove 52, then fall vertically between the two adjacent vertical third plates 513, and then enter between the two adjacent vertical first plates 511, so that the grains and hot dry air between the two adjacent diverters 5 can flow vertically downward, thereby reducing the turbulence of the air between the two diverters 5 and avoiding lateral movement of the grains that causes uneven distribution of the grains inside the drying chamber 4.

[0037] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A grain drying tower based on a heat pump, characterized in that: include: The outer tower (1) is provided with a feed inlet (11) at the top, a discharge outlet (12) at the bottom and a cold air outlet (13); An inner tower (2) is arranged inside the drying section and fixedly connected to the outer tower (1), a grain drying chamber (4) is formed between the outer tower (1) and the inner tower (2), the inner tower (2) is provided with a hot air inlet (21) at its bottom and a hot air outlet (22) at its top, the hot air outlet (22) being located directly below the feed port (11); a centrifugal fan (3) rotatably mounted on the hot air outlet (22) around a vertical axis, and configured to rotate when driven by the rising hot air to discharge the hot air radially; A centrifugal material distribution plate (31) is fixedly connected to the centrifugal fan (3) and covers the top of the centrifugal fan (3), and is used to throw the grains falling from the feed inlet (11) onto the inner wall of the outer tower (1) by centrifugal force when rotating.

2. A grain drying tower based on a heat pump according to claim 1, characterized in that: The outer tower (1) further comprises a material storage chamber (14) arranged below the inner tower (2), the material discharge port (12) being arranged at the bottom of the material storage chamber (14), and the cold air outlet (13) being arranged between the drying chamber (4) and the material storage chamber (14).

3. A grain drying tower based on a heat pump according to claim 1, characterized in that: The hot air inlet (21) is connected to the hot air supply side of the heat pump via a hot air pipe (23) that runs through the outer tower (1), and the cold air outlet (13) is connected to the cold air discharge side of the heat pump via a cold air pipe (15).

4. A grain drying tower based on a heat pump according to claim 1, characterized in that: The diameter of the hot air outlet (22) is smaller than the diameter of the inner tower (2), so that the hot air is accelerated when passing through the hot air outlet (22) to form a high-speed airflow that is sprayed onto the centrifugal fan (3).

5. A grain drying tower based on a heat pump according to claim 1, characterized in that: A plurality of flow dividers (51) are arranged between the outer tower (1) and the inner tower (2); the flow dividers (51) are fixedly connected to one of the outer tower (1) and the inner tower (2); a plurality of the flow dividers (51) are evenly distributed around the axis of the inner tower (2) to form a flow divider (5); and a guide groove (52) inclined to the axis of the drying chamber (4) is formed between two adjacent flow dividers (51).

6. A grain drying tower based on a heat pump according to claim 5, characterized in that: The plurality of flow dividers (5) are evenly distributed along the vertical direction.

7. A grain drying tower based on a heat pump according to claim 6, characterized in that: The diverter plate (51) comprises a first plate (511), a second plate (512), and a third plate (513) which are sequentially connected from top to bottom, wherein the first plate (511) and the third plate (513) are vertical, and the second plate (512) is inclined.

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