Tower type dryer

Abstract

The tower type dryer comprises a tower body and a machine frame connected with the tower body, the top of the tower body is respectively provided with a feeding airlock and a hot air outlet which are communicated with the interior of the tower body, the bottom of the tower body is provided with a discharging airlock which is communicated with the interior of the tower body, and the top of the tower body is further provided with a distributing device and a rotation stopping material level device which extend to the inner side of the tower body. A hot air inlet communicated with the interior of the tower body is formed in the position, close to the bottom, of the side face of the tower body, a mesh impeller discharging mechanism is arranged in the tower body, a discharging driving motor which is connected with the mesh impeller discharging mechanism and drives the mesh impeller discharging mechanism to conduct discharging is arranged on the outer side of the tower body, and the discharging driving motor is electrically connected with a rotation stopping material level device. And at least one group of material pressure reduction components is arranged at the position, above the mesh impeller discharging mechanism, on the inner side of the tower body. According to the tower type dryer, the drying mechanism that hot air flows from bottom to top in a reverse flow mode is adopted, so that the tower type dryer has high heat utilization rate, and efficient drying of materials is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of material drying, and specifically relates to a tower dryer. Background Art

[0002] At present, tower dryers used for drying granular materials such as grains and agricultural products at home and abroad generally operate in batches and intermittently. And because the required drying volume is large, the material layer is too thick and the hot air cannot flow through the bottom. Therefore, it is generally adopted to enter and exit the hot air in sections from the side or to add a central pipe in the center to input hot air in sections for convection heat exchange with the material. Therefore, this inevitably causes the material close to the hot air inlet to dry quickly, and the material far from the hot air inlet to dry slowly; it also inevitably causes the material to be unevenly dry and wet. In order to achieve a better drying effect, a drying device needs to be redesigned to meet the existing needs. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a tower dryer in view of the deficiencies of the above-mentioned prior art. The tower dryer adopts a bottom-up countercurrent drying mechanism of hot air, so that the tower dryer has a higher heat utilization rate and ensures the efficiency of material drying. The linkage between the rotary level sensor and the mesh impeller feeding mechanism ensures the high stability of the material layer inside the tower body, thereby ensuring the drying uniformity of the material.

[0004] The technical solution adopted by the utility model is: a tower dryer comprises a tower body and a frame connected to the tower body, the top of the tower body is respectively provided with a feed air shut-off fan and a hot air outlet connected to the interior thereof, the bottom of the tower body is provided with a discharge air shut-off fan connected to the interior thereof, the top of the tower body is also provided with a distributor and a rotary damper extending to the inner side thereof, a hot air inlet connected to the interior thereof is provided at a position near the bottom of the side surface of the tower body, a mesh impeller unloading mechanism is provided inside the tower body, a unloading drive motor connected to the mesh impeller unloading mechanism and driving the mesh impeller unloading mechanism to unload material is provided outside the tower body, the unloading drive motor is electrically connected to the rotary damper, the mesh impeller unloading mechanism comprises an array of impeller assemblies, two adjacent groups of impeller assemblies are connected by a power transmission assembly, a group of impeller assemblies close to the unloading drive motor is connected to the unloading drive motor through the power transmission assembly, and at least one group of material decompression assemblies is provided at a position above the mesh impeller unloading mechanism inside the tower body.

[0005] In one of the embodiments, each group of impeller assemblies includes two relatively rotating feed shafts and feed impellers respectively arranged on the two feed shafts, each of the feed shafts is connected to the frame through a bearing seat, the two feed shafts are connected by a synchronous transmission assembly that drives the two feed shafts to rotate, one of the feed shafts of two adjacent impeller assemblies is connected by a power transmission assembly, and a first mesh hole is opened on the feed blade of each feed impeller, and when the mesh impeller feed mechanism is stationary, the feed blades on the opposite sides of the two feed impellers of each group of impeller assemblies extend to each other between the feed blades of the other feed impeller to form a blocking angle.

[0006] In one of the embodiments, the material distributor includes a material distribution device including a material distribution drive motor and a material distribution connecting rod connected to an output shaft of the material distribution drive motor, and the material distribution connecting rod is provided with a material distribution plate detachably connected thereto.

[0007] In one embodiment, the material decompression components are in multiple groups and are distributed vertically inside the tower body.

[0008] In one embodiment, each group of the material decompression components includes a plurality of decompression plates with second mesh holes opened on the surface.

[0009] In one of the embodiments, a wind distribution screen is provided on the inner side of the tower body between the mesh impeller discharge mechanism and the hot air inlet.

[0010] In one of the embodiments, a feed belt conveyor is provided above the tower body, and a discharge end of the feed belt conveyor is located above the feed air shut-off fan.

[0011] The beneficial effects of the utility model are:

[0012] 1. It adopts the drying mechanism of hot air from bottom to top countercurrent. At the same time, due to the setting of feed air lock and discharge air lock, it can ensure that the hot air is forced to pass through the gaps of the material without leakage under the action of the external fan to dry the material, forming a strong convection heat exchange, so that this tower dryer has a higher heat utilization rate and ensures the high efficiency of material drying;

[0013] 2. The setting of mesh impeller feeding mechanism, feeding is carried out by the rotation of the feeding impeller, and a blocking angle is set to block the falling of materials. Each feeding blade is provided with a hot air through hole, which can ensure that the materials are blocked at the upper part of the mesh impeller feeding mechanism after entering the tower body, and the hot air can pass smoothly, thereby ensuring the effective operation of the dryer;

[0014] 3. Set up a distributor to level the material by rotating it to ensure that the top surface height of the material layer in the tower body is consistent;

[0015] 4. Set up pressure relief plates, and each pressure relief plate is provided with mesh holes, so that it does not affect the hot air flow, and also reduces the hot air flow resistance and the pressure of the material on the mesh impeller discharge mechanism due to gravity.

[0016] 5. The linkage between the rotary paddle level sensor and the mesh impeller feeding mechanism ensures the high stability of the material layer inside the tower body, thereby ensuring the uniformity of material drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the connection between the mesh impeller feeding mechanism and the feeding drive motor of the utility model;

[0019] Figure 3 This is a schematic diagram of the connection of various components of the mesh impeller feeding mechanism of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the impeller assembly of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the distributor of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the pressure reducing plate of the utility model.

[0023] In the figure: 1. tower body; 2. frame; 3. feed fan; 4. hot air outlet; 5. discharge fan; 6. hot air inlet; 7. mesh impeller unloading mechanism; 8. unloading drive motor; 9. distributor; 10. material pressure reducing assembly; 11. belt conveyor; 12. rotary level control device; 13. wind distribution screen; 701. impeller assembly; 702. power transmission assembly; 7011. unloading shaft; 7012. unloading impeller; 7013. bearing seat; 7014. synchronous transmission assembly; 7015. material stop angle; 70121. unloading blade; 70122. first mesh; 901. distribution drive motor; 902. distribution connecting rod; 903. distribution plate; 1001. pressure reducing plate; 10011. second mesh. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1-Figure 6As shown, a tower dryer comprises a tower body 1 and a frame 2 connected to the tower body 1, wherein the top of the tower body 1 is respectively provided with a feed air shut-off fan 3 and a hot air outlet 4 connected to the inside thereof, the bottom of the tower body 1 is provided with a discharge air shut-off fan 5 connected to the inside thereof, the top of the tower body 1 is also provided with a distributor 9 and a rotary damper 12 extending to the inside thereof, a hot air inlet 6 connected to the inside thereof is provided at a position near the bottom of the side of the tower body 1, a mesh impeller discharge mechanism 7 is provided inside the tower body 1, and the outside of the tower body 1 is provided with a mesh impeller discharge mechanism connected to the mesh impeller discharge mechanism The mesh impeller feeding mechanism 7 is connected to and drives the feeding drive motor 8 for feeding materials through the mesh impeller feeding mechanism 7, the feeding drive motor 8 is electrically connected to the rotary damper 12, the mesh impeller feeding mechanism 7 includes an array of impeller assemblies 701, two adjacent groups of impeller assemblies 701 are connected by a power transmission assembly 702, a group of impeller assemblies 701 close to the feeding drive motor 8 is connected to the feeding drive motor 8 by the power transmission assembly 702, and at least one group of material decompression assemblies 10 is provided on the inner side of the tower body 1 above the mesh impeller feeding mechanism 7.

[0026] In this embodiment, each group of impeller assemblies 701 includes two relatively rotating unloading shafts 7011 and unloading impellers 7012 respectively arranged on the two unloading shafts 7011, each of the unloading shafts 7011 is connected to the frame 2 through a bearing seat 7013, the two unloading shafts 7011 are connected by a synchronous transmission assembly 7014 that drives the two unloading shafts 7011 to rotate, one of the unloading shafts 7011 of two adjacent impeller assemblies 701 is connected by a power transmission assembly 702, and a first mesh hole 70122 is opened on the unloading blade 70121 of each unloading impeller 7012, and when the mesh impeller unloading mechanism 7 is stationary, the unloading blades 70121 on the opposite sides of the two unloading impellers 7012 of each group of impeller assemblies 701 extend to each other between the unloading blades 70121 of the other unloading impeller 7012 and form a blocking angle 7015.

[0027] In this embodiment, the material distributor 9 includes a material distribution device 901 and a material distribution connecting rod 902 connected to the output shaft of the material distribution driving motor 901, and the material distribution connecting rod 902 is provided with a material distribution plate 903 detachably connected thereto.

[0028] In this embodiment, the material decompression components 10 are multiple groups and are distributed vertically inside the tower body 1 .

[0029] In this embodiment, each group of the material decompression components 10 includes a plurality of decompression plates 1001 with second mesh holes 10011 opened on the surface.

[0030] In this embodiment, a wind distribution screen 13 is provided on the inner side of the tower body 1 between the mesh impeller feeding mechanism 7 and the hot air inlet 6 .

[0031] In this embodiment, a feeding belt conveyor 11 is provided above the tower body 1 , and a discharge end of the feeding belt conveyor 11 is located above the feeding air shut-off fan 3 .

[0032] When the material needs to be dried, the material enters the tower body 1 through the feed air shut-off fan 3; the mesh impeller unloading mechanism 7 is arranged on the inner side of the tower body 1, and the interior of the tower body 1 can be divided into two chambers, a drying chamber and a hot air distribution chamber. The drying chamber carries the material for drying; the hot air distribution chamber is used to distribute the hot air evenly to achieve a better drying effect. When the material enters the tower body 1, when the mesh impeller unloading mechanism 7 is in a stationary state, a blocking angle 7015 will be formed between the unloading blades 70121 on the opposite side of the two unloading impellers 7012 of the same impeller assembly 701. When the angle of the blocking angle 7015 is smaller than the repose angle of the material, the material cannot pass between the impeller assemblies 701; therefore, as long as the angle of the blocking angle 7015 is set, the material will stay in the tower body 1 when the mesh impeller unloading mechanism 7 is not running.

[0033] In order to achieve a better drying effect, a fan is provided on the hot air inlet 6, and the hot air enters the tower body 1 through the hot air inlet 6. Since a feed air shutoff and a discharge air shutoff are provided, it can be ensured that the hot air does not leak; under the action of the fan, the hot air is uniformly forced to pass through the mesh impeller discharge mechanism 7 from bottom to top, and then forced to pass through the gaps between the materials, so a large speed difference is formed between the hot air and the materials, thereby generating a strong convection heat exchange between the hot air and the materials; since the tower dryer adopts a bottom-up countercurrent drying mechanism of hot air, the tower dryer has a higher heat utilization rate. In this process, since the first mesh hole 70122 is opened on the discharge blade 70121 of each discharge impeller 7012, the hot air flow is not affected. The hot air used for drying is discharged from the hot air outlet 4. If a circulating fan is provided on the hot air outlet 4, the hot air can be circulated.

[0034] According to the properties of the material, if the material in the lower layer has reached the drying effect after drying for a certain period of time, the material can be discharged. When the material is blocked at the upper part by the mesh impeller discharge mechanism 7, the height of the material layer will gradually increase. When the rising material layer contacts the rotating blades of the rotary level control device 12, the resistance of the material will stop the rotary level control device 12 from rotating. The mesh impeller discharge mechanism 7 linked to the rotary level control device 12 receives a signal to start running, and the blocked lower layer material starts to fall and is discharged from the tower body 1 by the discharge fan 5. As the material is discharged, the height of the material layer will gradually decrease. When the lowered material layer does not contact the blades of the rotary level control device 12, the rotary level control device 12 resumes rotating due to the lack of resistance. The mesh impeller discharge mechanism 7 linked to the rotary level control device 12 receives a signal to stop running, and the material continues to be blocked on the mesh impeller discharge mechanism 7, and the height of the material layer will gradually increase again. This cycle repeats itself, so that the height of the material layer is stabilized at a certain height. In this way, since the material layer height is stable, the uniformity of drying is also guaranteed. The height of the material layer can be set by adjusting the position of the blades of the rotary level controller 12.

[0035] During unloading, the unloading drive motor 8 drives a group of impeller assemblies 701 near the unloading drive motor 8 to rotate through the power transmission assembly 702. Since one of the unloading shafts 7011 of two adjacent impeller assemblies 701 is connected through the power transmission assembly 702, this group of impeller assemblies 701 drives the adjacent group of impeller assemblies 701 to rotate through the power transmission assembly 702; the power is transmitted in sequence, thereby driving all the impeller assemblies 701 to rotate. The material enters between the unloading blades 70121 of each group of unloading impellers 7012, and under the rotation of the unloading blades 70121, the material is driven to fall, so that the material is discharged by the discharge fan 5. Since the two unloading shafts 7011 of the same group of impeller assemblies 701 are connected through the synchronous transmission assembly 7014, and the two unloading shafts 7011 are driven to rotate relative to each other, unloading can be smoothly achieved. In this process, the amount of material discharged from the bottom layer is determined according to the drying condition of the material, and the speed of the feed conveyor 11 is adjusted. Since the height of the material in the tower body is stable, the feed speed and the discharge speed are the same. In this way, by controlling the feed speed, the residence time of the material in the machine is also controlled, which can be adjusted according to the drying needs of the material.

[0036] In order to increase the service life of the bearing seat 7013, the bearing seat 7013 of the impeller assembly 701 adopts a heat-resistant bearing seat 7013, so that the rotating mesh impeller unloading mechanism 7 can withstand high-temperature hot air to avoid damaging the bearing. In order to make the bearing seat 7013 adapt to high-temperature drying media, the bearing seat 7013 adopts hollow water cooling.

[0037] The power transmission assembly 702 of the tower dryer is a pulley assembly composed of a belt and a pulley, the pulley connects the output shaft of the unloading drive motor 8 and the unloading shaft 7011 and one of the unloading shafts 7011 of two adjacent impeller assemblies 701, and the belt connects the two pulleys. The synchronous transmission assembly 7014 is composed of two gears, and the two gears are meshed with each other to realize the relative rotation of the two unloading shafts 7011 of the same impeller assembly 701.

[0038] In order to achieve a better drying effect, the tower dryer is provided with a distributor 9 for leveling the material entering the tower body 1. When leveling the material, the distribution drive motor 901 drives the distribution connecting rod 902 to rotate through its output shaft, thereby driving the distribution plate 903 to rotate to level the material. In order to ensure that the material layer height is uniform when the distributor 9 is working and to avoid dead corners, the inner cross-section of the upper half of the tower body 1 is made into an octagonal cross-section. At the same time, in order to achieve a better material discharge effect, the lower half of the tower body 1 is designed to be bucket-shaped. Since the distribution connecting rod 902 and the distribution plate 903 are detachably connected, the position of the distribution plate 903 can be adjusted according to the actual situation of the material.

[0039] In order to reduce the resistance of the material layer to the hot air, multiple layers of pressure relief plates 1001 are arranged in the tower body 1. The spacing distance between the pressure relief plates 1001 of the same group of material pressure relief assemblies 10 is set to be consistent. At least one layer of pressure relief plates 1001 is arranged above the gap between the two groups of impeller assemblies 701. At least one layer of pressure relief plates 1001 is arranged above the position between the two material discharge impellers 7012 of the same group of impeller assemblies 701. The multiple layers of pressure relief plates 1001 cooperate with each other, and since the second mesh 10011 is arranged on each pressure relief plate 1001, it does not affect the flow of hot air, and also reduces the resistance to the flow of hot air and the pressure of the material on the mesh impeller discharge mechanism 7 due to gravity.

[0040] A feeding belt conveyor 11 is arranged above the tower body 1, and a feeding end of the feeding belt conveyor 11 is located above the feeding air shut-off fan 3. After the material in the tower body 1 is unloaded, the belt conveyor 11 is opened to replenish the material in the tower body 1.

[0041] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A tower dryer, characterized in that: The invention comprises a tower body (1) and a frame (2) connected to the tower body (1); the top of the tower body (1) is respectively provided with a feed air shut-off fan (3) and a hot air outlet (4) connected to the inside of the tower body (1); the bottom of the tower body (1) is provided with a discharge air shut-off fan (5) connected to the inside of the tower body; the top of the tower body (1) is also provided with a distributor (9) and a rotary damper (12) extending to the inside of the tower body; a hot air inlet (6) connected to the inside of the tower body (1) is provided at a position near the bottom of the side of the tower body (1); a mesh impeller discharge mechanism (7) is provided inside the tower body (1); and the outside of the tower body (1) is provided with a mesh impeller discharge mechanism (7) connected to the mesh impeller discharge mechanism (7). A material discharge drive motor (8) is provided for driving the mesh impeller material discharge mechanism (7) to discharge material, the material discharge drive motor (8) being electrically connected to the rotary damper (12), the mesh impeller material discharge mechanism (7) comprising a plurality of impeller assemblies (701), two adjacent impeller assemblies (701) being connected via a power transmission assembly (702), a group of impeller assemblies (701) close to the material discharge drive motor (8) being connected to the material discharge drive motor (8) via the power transmission assembly (702), and at least one group of material pressure reducing assemblies (10) being provided on the inner side of the tower body (1) above the mesh impeller material discharge mechanism (7).

2. A tower dryer according to claim 1, characterized in that: Each set of impeller assemblies (701) comprises two relatively rotatable feed shafts (7011) and feed impellers (7012) respectively arranged on the two feed shafts (7011); each of the feed shafts (7011) is connected to the frame (2) via a bearing seat (7013); the two feed shafts (7011) are connected via a synchronous transmission assembly (7014) for driving the two feed shafts (7011) to rotate; one of the feed shafts (7011) of two adjacent impeller assemblies (701) is connected to the frame (2) via a synchronous transmission assembly (7014) for driving the two feed shafts (7011) to rotate. 11) are connected by a power transmission assembly (702), and a first mesh hole (70122) is formed on the unloading blade (70121) of each unloading impeller (7012). When the mesh impeller unloading mechanism (7) is stationary, the unloading blades (70121) on the opposite sides of the two unloading impellers (7012) of each impeller assembly (701) extend to between the unloading blades (70121) of the other unloading impeller (7012) and form a blocking angle (7015).

3. A tower dryer according to claim 1 or 2, characterized in that: The material distributor (9) comprises a material distribution device (901) and a material distribution connecting rod (902) connected to the output shaft of the material distribution driving motor (901), and the material distribution connecting rod (902) is provided with a material distribution plate (903) detachably connected thereto.

4. A tower dryer according to claim 3, characterized in that: The material decompression components (10) are in multiple groups and are distributed vertically inside the tower body (1).

5. A tower dryer according to claim 1, 2 or 4, characterized in that: Each group of the material decompression components (10) comprises a plurality of decompression plates (1001) with second mesh holes (10011) opened on the surface.

6. A tower dryer according to claim 5, characterized in that: A wind distribution screen (13) is provided on the inner side of the tower body (1) at a position between the mesh impeller feeding mechanism (7) and the hot air inlet (6).

7. A tower dryer according to claim 1, 2, 4 or 6, characterized in that: A feeding belt conveyor (11) is provided above the tower body (1), and a discharge end of the feeding belt conveyor (11) is located above the feeding air shut-off fan (3).

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