Airflow type dryer for processing pea protein powder

Abstract

The utility model relates to the technical field of vegetable protein processing, and discloses an air flow type dryer for pea protein powder processing, which comprises a drying pipe, the top of the outer wall of the drying pipe penetrates through and is fixedly connected with a threaded cylinder, and one end of the drying pipe is fixedly connected with a cover plate. And one end of the cover plate penetrates through and is provided with a cold air assembly used for introducing cold air jet flow rotating in the reverse direction, the inner wall of the drying pipe is fixedly connected with a spiral protruding edge, and one side of the outer wall of the drying pipe penetrates through and is fixedly connected with a feeding pipe. According to the device, firstly, hot air is sent into the drying pipe through the hot air pipe, high-speed hot air flow advances along the spiral protruding edges through the Coanda effect to form a rotating air flow field, then reversely-rotating cold air jet flow is introduced into the center of the drying pipe through the cold air assembly, and forward-rotating hot air and reverse-rotating cold air are formed; the material particles are radially migrated, so that the wall surface is prevented from adhering to the wall.

Description

Technical Field

[0001] This utility model relates to the field of plant protein processing, and in particular to an airflow dryer for processing pea protein powder. Background Technology

[0002] Peas, belonging to the legume family, contain high-quality protein. Pea protein contains all the essential amino acids required by the human body, classifying it as a complete protein. The extraction process typically focuses on extracting the water-soluble protein, which is then crystallized, cold-dried, and screened to obtain high-purity protein powder. Large-scale production enterprises generally employ streamlined processes in this area, rapidly screening and packaging the protein powder after cold drying to prevent it from reabsorbing moisture and ensure its quality.

[0003] Delays in the screening and packaging processes of the assembly line, such as machine maintenance or staff leave, coupled with the rainy season in summer, can cause the cold-dried protein powder to reabsorb moisture before being packaged. It must then be dried again to ensure quality. Since the amount of protein powder reabsorbed is not large, processing it in a large-scale cold-drying machine wastes energy that would otherwise be needed to start the machine.

[0004] Traditional airflow dryers often use straight pipes or simple spiral structures, which easily create a high-speed zone in the center and a low-speed zone at the edge. This results in uneven contact between the material and the hot air, leading to localized over-drying or under-drying. For example, in a straight pipe dryer, pea protein powder particles tend to settle at the bottom of the pipe due to gravity, forming a "dead zone." Pea protein is highly heat-sensitive (easily denatured above 60°C), and traditional high-temperature short-time drying or low-speed airflow can easily cause localized overheating and particle agglomeration. To increase the drying speed, high-temperature hot air or high-flow airflow is required, leading to a surge in energy consumption. At the same time, the waste heat from the exhaust gas is not fully recovered.

[0005] To address the aforementioned issues, an airflow dryer for processing pea protein powder is proposed. Utility Model Content

[0006] The purpose of this invention is to provide an airflow dryer for processing pea protein powder, which solves the problems of uneven airflow distribution and low drying efficiency in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an airflow dryer for processing pea protein powder, comprising a drying tube, a threaded cylinder being connected through and fixedly connected to the top of the outer wall of the drying tube, a cover plate being fixedly connected to one end of the drying tube, a cold air assembly for introducing a reverse-rotating cold air jet being provided through and at one end of the cover plate, a positive spiral convex rib being fixedly connected to the inner wall of the drying tube, a feeding pipe being connected through and fixedly connected to one side of the outer wall of the drying tube, a first servo motor being fixedly connected to one end of the feeding pipe, a feeding screw being fixedly connected to the output end of the first servo motor, and the feeding screw contacting the inner wall of the feeding pipe, and a discharge pipe being connected through and fixedly connected to the top of the feeding pipe.

[0008] By adopting the above technical solution, the length of the drying tube is reduced from 15m to 8m for the same processing capacity, and the floor space is reduced by 40%.

[0009] As a further description of the above technical solution: the cooling air assembly includes a ventilation duct, which is connected to and fixedly connected to a cover plate. One end of the ventilation duct is fixedly connected to a jet fan, and a sealing cover is rotatably connected to the top of the outer wall of the ventilation duct. The other end of the sealing cover is fixedly connected to a latch, which engages with the ventilation duct.

[0010] By adopting the above technical solution, a low-temperature protective layer is formed in the center of the cold air jet, the surface temperature of the material does not exceed 70℃ (the outlet temperature of traditional equipment is 60~80℃), and the protein denaturation rate is reduced by 50%.

[0011] As a further description of the above technical solution: a fixed frame is slidably connected to the inner wall of the ventilation duct, a first filter screen is fixedly connected to one end of the inner wall of the fixed frame, a second filter screen is fixedly connected to the middle of the inner wall of the fixed frame, a third filter screen is fixedly connected to the other end of the inner wall of the fixed frame, and a reverse spiral convex rib is fixedly connected to the other end of the inner wall of the ventilation duct.

[0012] By adopting the above technical solution, the filter screen is used to filter impurities in the air and prevent them from entering the drying tube and contaminating the material.

[0013] As a further description of the above technical solution: a storage tank is connected through and fixedly connected to the top of the feeding pipe, and a valve is connected through and fixedly connected to the middle of the outer wall of the feeding pipe.

[0014] By adopting the above technical solution, the valve controls the material feeding speed.

[0015] As a further description of the above technical solution: a second servo motor is fixedly connected to the top of the storage tank, and a stirring rod is fixedly connected to the output end of the second servo motor.

[0016] By adopting the above technical solution, the storage tank is used to store pea protein powder material to be dried, and the second servo motor drives the stirring rod to stir the material to prevent clumping.

[0017] As a further description of the above technical solution: a hot air pipe is threadedly connected to the inner wall of the threaded cylinder, and a hot air blower is fixedly connected to one end of the hot air pipe.

[0018] By adopting the above technical solution, hot air is introduced into the drying tube through a threaded cylinder via a hot air pipe, providing heat for the drying of materials.

[0019] As a further description of the above technical solution: the other end of the drying tube is fixedly connected to a first connecting tube, and a cyclone dust collector is fixedly connected through and to the outer wall of the first connecting tube.

[0020] By adopting the above technical solution, the dried material and the hot air mixture enter the cyclone dust collector through the first connecting pipe, and the larger particles of material are initially separated.

[0021] As a further description of the above technical solution: the output end of the cyclone dust collector is fixedly connected to a second connecting pipe, and one end of the second connecting pipe is fixedly connected to a bag dust collector.

[0022] By adopting the above technical solution, the gas then enters the bag filter for further filtration of fine particles, achieving gas-solid separation, ensuring that the discharged gas is clean, and avoiding environmental pollution.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This utility model provides an airflow dryer for processing pea protein powder. First, hot air is sent into the drying tube through a hot air duct. The Coanda effect is used to make the high-speed hot airflow advance along the positive spiral convex ridge, forming a rotating airflow field. Then, a reverse rotating cold air jet is introduced into the center of the drying tube through a cold air assembly, forming a forward rotating hot air and a reverse rotating cold air, which causes the material particles to migrate radially and avoid sticking to the wall. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present utility model;

[0026] Figure 2 This is a top view of the present invention;

[0027] Figure 3 This is a cross-sectional view of the drying tube of this utility model;

[0028] Figure 4 This is a cross-sectional view of the storage tank of this utility model;

[0029] Figure 5This is a schematic diagram of the drying tube of this utility model.

[0030] Legend:

[0031] 1. Drying pipe; 2. Hot air blower; 3. Storage tank; 4. First connecting pipe; 5. Cyclone dust collector; 6. Bag dust collector; 7. Second connecting pipe; 8. Cover plate; 9. Ventilation pipe; 10. Sealing cover; 11. Lock; 12. Threaded cylinder; 13. Feeding pipe; 14. First servo motor; 15. Discharge pipe; 16. Valve; 17. Second servo motor; 18. Jet fan; 19. Hot air pipe; 20. Stirring rod; 21. Positive spiral convex rib; 22. Feeding screw; 23. Fixing frame; 24. First filter screen; 25. Second filter screen; 26. Third filter screen; 27. Reverse spiral convex rib. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0034] Combination Figure 1 , Figure 2 and Figure 4This utility model discloses an airflow dryer for processing pea protein powder, comprising a drying pipe 1, a threaded cylinder 12 that is fixedly connected to the top of the outer wall of the drying pipe 1, a cover plate 8 that is fixedly connected to one end of the drying pipe 1, a cold air assembly for introducing a reverse-rotating cold air jet that is provided at one end of the cover plate 8, a storage tank 3 that is fixedly connected to the top of the feeding pipe 15, a valve 16 that is fixedly connected to the middle of the outer wall of the feeding pipe 15, a second servo motor 17 that is fixedly connected to the top of the storage tank 3, a stirring rod 20 that is fixedly connected to the output end of the second servo motor 17, and a feeding device consisting of a feeding pipe 13, a first servo motor 14, a feeding screw 22, a storage tank 3, a feeding pipe 15, and a valve 16. The storage tank 3 is used to store the pea protein powder to be dried. The material is stirred by a second servo motor 17 driving a stirring rod 20 to prevent clumping. A valve 16 controls the material feeding speed. A first servo motor 14 drives a feeding screw 22 to feed the material from a feeding pipe 13 into a drying pipe 1. A first connecting pipe 4 is fixedly connected to the other end of the drying pipe 1. A cyclone dust collector 5 is fixedly connected through the outer wall of the first connecting pipe 4. A second connecting pipe 7 is fixedly connected to the output end of the cyclone dust collector 5. A bag filter 6 is fixedly connected to one end of the second connecting pipe 7. The dried material and the hot air mixture enter the cyclone dust collector 5 through the first connecting pipe 4, where larger particles are initially separated. The gas then enters the bag filter 6 for further filtration of fine particles, achieving gas-solid separation and ensuring that the discharged gas is clean, thus avoiding environmental pollution.

[0035] Combination Figure 3 and Figure 5 The inner wall of the drying tube 1 is fixedly connected with a spiral ridge 21, which allows the material to move along a specific path during the drying process, increasing the contact time and area between the material and the hot air. A feeding pipe 13 is fixedly connected through one side of the outer wall of the drying tube 1. A first servo motor 14 is fixedly connected to one end of the feeding pipe 13. A feeding screw 22 is fixedly connected to the output end of the first servo motor 14, and the feeding screw 22 contacts the inner wall of the feeding pipe 13. A discharge pipe 15 is fixedly connected through the top of the feeding pipe 13. A hot air pipe 19 is threadedly connected to the inner wall of the threaded cylinder 12. A hot air fan 2 is fixedly connected to one end of the hot air pipe 19. The hot air supply includes the hot air fan 2, the hot air pipe 19, and the threaded cylinder 12. The hot air fan 2 generates hot air, which enters the drying tube 1 through the hot air pipe 19 and the threaded cylinder 12 to provide heat for drying the material.

[0036] Combination Figure 2 and Figure 3The cooling air assembly includes a ventilation duct 9, which is connected to and fixedly connected to a cover plate 8. A jet fan 18 is fixedly connected to one end of the ventilation duct 9. A sealing cover 10 is rotatably connected to the top of the outer wall of the ventilation duct 9. A latch 11 is fixedly connected to the other end of the sealing cover 10 and engages with the ventilation duct 9. A mounting bracket 23 is slidably connected to the inner wall of the ventilation duct 9. A first filter 24 is fixedly connected to one end of the inner wall of the mounting bracket 23, a second filter 25 is fixedly connected to the middle of the inner wall of the mounting bracket 23, and a third filter 26 is fixedly connected to the other end of the inner wall of the mounting bracket 23. A reverse spiral rib 27 is fixedly connected to the other end of the inner wall of the ventilation duct 9. The cooling air assembly is mounted on the cover plate 8 and includes the ventilation duct 9, jet fan 18, sealing cover 10, latch 11, mounting bracket 23, and its internal components. The three-layer filter (first filter 24, second filter 25, and third filter 26) and the jet fan 18 deliver a jet of cold air into the ventilation duct 9. The rotation direction of the air is adjusted by the anti-spiral convex rib 27, causing the cold air to form a vortex, which cools the dried material. At the same time, the filter screens filter impurities in the air to prevent them from entering the drying tube 1 and contaminating the material. In the edge areas of the two vortices, the velocity and pressure distribution is uneven. The material particles are subjected to radial force in this uneven flow field and move from the position near the wall to the center area, avoiding the deposition and adhesion of material on the wall. This double vortex effectively improves the movement state of the material in the drying tube, improves the drying efficiency, and reduces problems such as uneven drying and difficult equipment cleaning caused by material adhesion to the wall.

[0037] Working principle: During use, add raw materials into storage tank 3, turn on the second servo motor 17, the output of the second servo motor 17 drives the stirring rod 20 to rotate, the stirring rod 20 stirs the raw materials to prevent sedimentation, open valve 16, the raw materials are sent to the feeding pipe 13 through the discharge pipe 15, and at the same time as opening valve 16, turn on the first servo motor 14, the output of the first servo motor 14 rotates, drives the feeding screw 22 to rotate, and sends the raw materials into the drying tube 1. At the same time, turn on the hot air blower 2, so that the hot air is sent to the drying tube 1 through the hot air pipe 19. Using the Coanda effect, the high-speed hot air flow advances along the positive spiral convex ridge 21 to form a rotating airflow field. Then, the cold air assembly introduces a reverse rotating cold air jet at the center of the drying tube 1. Due to the rotational characteristics of the vortex, a pressure difference will be generated in the radial direction. This pressure difference will cause the material particles to be subjected to a force in the radial direction pointing towards the center of the drying tube or away from the wall, thereby promoting the radial migration of the material particles and preventing them from sticking to the wall.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic dryer for processing of pea protein powder, comprising a drying tube (1), characterized in that: The outer wall top of the drying pipe (1) is penetrated and fixedly connected with a threaded cylinder (12), one end of the drying pipe (1) is fixedly connected with a cover plate (8), one end of the cover plate (8) is penetrated and provided with a cold air assembly for introducing reverse rotation cold air jet, the inner wall of the drying pipe (1) is fixedly connected with a positive helical rib (21), one side of the outer wall of the drying pipe (1) is penetrated and fixedly connected with a feeding pipe (13), one end of the feeding pipe (13) is fixedly connected with a first servo motor (14), the output end of the first servo motor (14) is fixedly connected with a feeding screw (22), and the feeding screw (22) is in contact with the inner wall of the feeding pipe (13), and the top of the feeding pipe (13) is penetrated and fixedly connected with a discharging pipe (15).

2. A pneumatic dryer for processing of pea protein powder according to claim 1, characterized in that: The cold air assembly comprises a ventilation pipe (9), the ventilation pipe (9) is penetrated and fixedly connected with the cover plate (8), one end of the ventilation pipe (9) is fixedly connected with a jet fan (18), the top of the outer wall of the ventilation pipe (9) is penetrated and rotatably connected with a sealing cover (10), the other end of the sealing cover (10) is fixedly connected with a lock catch (11), and the lock catch (11) is clamped with the ventilation pipe (9).

3. A pneumatic dryer for processing pea protein powder according to claim 2, characterized in that: The inner wall of the ventilation pipe (9) is slidably connected with a fixing frame (23), the inner wall of the fixing frame (23) is fixedly connected with a first filter screen (24), the inner wall of the fixing frame (23) is fixedly connected with a second filter screen (25) in the middle, the inner wall of the fixing frame (23) is fixedly connected with a third filter screen (26) at the other end, and the inner wall of the ventilation pipe (9) is fixedly connected with a reverse helical rib (27) at the other end.

4. A pneumatic dryer for processing of pea protein powder according to claim 1, characterized in that: The top of the discharging pipe (15) is penetrated and fixedly connected with a storage tank (3), and the outer wall of the discharging pipe (15) is penetrated and fixedly connected with a valve (16) in the middle.

5. A pneumatic dryer for processing pea protein powder according to claim 4, characterized in that: The top of the storage tank (3) is fixedly connected with a second servo motor (17), and the output end of the second servo motor (17) is fixedly connected with a stirring rod (20).

6. A pneumatic dryer for processing of pea protein powder according to claim 1, characterized in that: The inner wall of the threaded cylinder (12) is threadedly connected with a hot air pipe (19), and one end of the hot air pipe (19) is fixedly connected with a hot air fan (2).

7. A pneumatic dryer for processing of pea protein powder according to claim 1, characterized in that: The other end of the drying pipe (1) is fixedly connected with a first connecting pipe (4), and the outer wall of the first connecting pipe (4) is penetrated and fixedly connected with a cyclone dust collector (5).

8. A pneumatic dryer for processing pea protein powder according to claim 7, characterized in that: The output end of the cyclone dust collector (5) is fixedly connected with a second connecting pipe (7), and one end of the second connecting pipe (7) is fixedly connected with a bag-type dust collector (6).

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