Starch drying and screening device

Abstract

The invention relates to the technical field of starch processing, in particular to a starch drying and screening device which comprises a plurality of drying boxes and an air inlet pipe I. The drying boxes are sequentially arranged from top to bottom, every two adjacent drying boxes are communicated through a plurality of screening holes, and the sizes of the screening holes are sequentially reduced from top to bottom. The top of the first air inlet pipe sequentially penetrates through the multiple drying boxes from bottom to top and extends to the bottom of the drying box on the uppermost side. By adopting a material blowing mode, the material is subjected to circulating fluidization movement in the drying box, so that hot air flow and the material can be uniformly and comprehensively contacted conveniently, the material can be quickly and effectively dried conveniently, and meanwhile, the material can be in a suspended state for a long time and multiple times by adopting a fluidization drying mode; on the basis of fluidized drying of the materials, the materials pass through a plurality of screen holes repeatedly in a continuous movement mode of the materials, so that the situation that the small-particle materials are blocked by the large-particle materials can be avoided, and the screening effect can be improved conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of starch processing, in particular to a starch drying and screening device. Background Art

[0002] Starch is an important raw material for the food, pharmaceutical, chemical and other industries. Its processing efficiency and quality directly affect downstream industries. In the starch production process, drying and screening are the core links. The traditional process generally adopts a step-by-step operation mode of "drying first and then screening". This mode has significant disadvantages: First, starch with a certain water content is easy to clump during drying, which makes it impossible to directly dry the starch and requires it to be crushed again, which undoubtedly increases production costs and reduces efficiency; second, during drying, starches will block each other, resulting in hindered water evaporation and uneven starch temperature, affecting drying uniformity; third, the fine powder produced during screening needs secondary drying due to uneven humidity, which not only prolongs the process, but also causes partial gelatinization of heat-sensitive starch particles, reducing product quality. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a starch drying and screening device, the specific technical solution adopted by the device is: A starch drying and screening device according to the present invention comprises a plurality of drying boxes and an air inlet pipe. The plurality of drying boxes are arranged sequentially from top to bottom, and adjacent drying boxes are connected by a plurality of sieve holes, wherein the size of the sieve holes decreases sequentially from top to bottom. The top of the air inlet pipe passes through the plurality of drying boxes sequentially from bottom to top and extends to the bottom of the uppermost drying box. The air inlet pipe is connected to each of the drying boxes via a plurality of air inlets located at the bottom of each drying box. The uppermost drying box is provided with an exhaust pipe for exhausting gas and a bulk material structure for feeding materials into the drying box.

[0004] Furthermore, each drying box is provided with a collecting chamber at the bottom, the collecting chamber is communicated with the drying box, and the communication position between the collecting chamber and the drying box is blocked by a sealing plate, and a discharge pipe for discharging material is provided at the bottom of each collecting chamber; The sealing plates are connected by connecting rods, and the connecting rods are pushed up and down by cylinders.

[0005] Furthermore, the bulk material structure includes a base and several circular rings, the several circular rings are all located outside the base, and the several circular rings are arranged in sequence, and there are slits for bulk material between the base and the innermost circular ring and between two adjacent circular rings.

[0006] Furthermore, there are transmission wheels for transmission between the base and the adjacent rings, and between two adjacent rings, and the transmission wheels are supported by a support body.

[0007] Furthermore, two retaining edges are provided on the outer wall of the base and the inner and outer walls of each of the circular rings. The two retaining edges are distributed up and down and are used to limit the transmission wheel.

[0008] Furthermore, a rolling wheel is provided at the bottom of each transmission wheel, and the rolling wheel is used to roll the material in the slit, and the rolling wheel is fixedly connected to the support body through a connecting plate; Wherein, the rolling wheel is composed of two conical wheels, and the two conical wheels are respectively used in conjunction with the base and the ring on both sides of the slit or the two adjacent rings.

[0009] Furthermore, the bulk material structure further comprises a buckle cover buckled on the outer sides of the plurality of the rings, and the support body is fixedly connected to the buckle cover, the buckle cover is connected with a vertical pipe, the vertical pipe is obliquely provided with a feed channel, and the feed channel is closed after the feeding is completed; An air intake pipe 2 is provided in the middle of the vertical pipe, and the air intake pipe 2 passes through the vertical pipe and the base. An air guide plate is provided at the bottom opening of the air intake pipe 2, and a plurality of auxiliary air holes are opened on the outer wall of the air intake pipe 2 inside the vertical pipe.

[0010] Furthermore, a core column connected to the air guide plate is provided in the second air intake pipe, a fixed cover is provided on the top of the second air intake pipe, and the fixed cover is relatively fixed to the feed channel, the second air intake pipe rotates on the fixed cover, and the fixed cover is connected to the air supply pipe; Wherein, the position of the core column on the fixed cover can be adjusted.

[0011] The beneficial effects of the present invention are: By adopting the method of blowing the material, the material is made to circulate and fluidize in the drying box, so that the hot air flow can contact the material evenly and comprehensively, and the material can be dried quickly and effectively. At the same time, the fluidized drying method can keep the material in a suspended state for a long time and multiple times; by using the method of continuous movement of the material on the basis of fluidized drying, the material is made to pass through several sieve holes repeatedly, which can avoid the obstruction of large particles to small particles and facilitate the improvement of screening effect; by using the fluidized movement method of the material, the drying work is combined with the screening work, which not only improves the material processing effect, but also realizes the multi-functional working mode of one machine. At the same time, since the material in each drying box can be fluidized independently, the screened material can be dried separately, so that the drying work continues in the entire screening process of the material; since the drying and screening of the material are carried out simultaneously, there is no need to perform secondary drying treatment on the screened material, which simplifies the drying steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 yes Figure 1 Schematic diagram of cross-section structure; Figure 3 yes Figure 2 A partial enlarged structural diagram in the middle; Figure 4 2 is a schematic structural diagram of a bulk material structure according to an embodiment of the present invention; Figure 5 yes Figure 4 Schematic diagram of the structure viewed from above; Figure 6 is a schematic diagram of several ring arrangements in an embodiment of the present invention; Figure 7 yes Figure 6 Schematic diagram of cross-section structure; Figure 8 2 is a schematic structural diagram of a transmission wheel and a rolling wheel in an embodiment of the present invention; Figure 9 It is a schematic diagram of the enlarged structure of the circular ring part in an embodiment of the present invention.

[0014] Reference numerals: 1. Drying box; 2. Sieve hole; 3. Inlet pipe 1; 4. Air inlet; 5. Exhaust duct; 6. Collection chamber; 7. Sealing plate; 8. Discharge pipe; 9. Connecting rod; 10. Cylinder; 11. Bulk material structure; 12. Base; 13. Ring; 14. Support body; 15. Drive wheel; 16. Baffle; 17. Rolling wheel; 18. Connecting plate; 19. Buckle cover; 20. Vertical pipe; 21. Feed channel; 22. Inlet pipe 2; 23. Air guide plate; 24. Auxiliary air hole; 25. Core column; 26. Fixed cover; 27. Air supply pipe. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integrated connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0018] like Figures 1 to 9 As shown, a starch drying and screening device of the present invention includes a plurality of drying boxes 1 and an air inlet pipe 3. The plurality of drying boxes 1 are arranged sequentially from top to bottom. Adjacent drying boxes 1 are connected by a plurality of sieve holes 2, and the size of the sieve holes 2 decreases sequentially from top to bottom. The top of the air inlet pipe 3 passes through the plurality of drying boxes 1 sequentially from bottom to top and extends to the bottom of the uppermost drying box 1. The air inlet pipe 3 is connected to each drying box 1 through a plurality of air inlets 4 located at the bottom of each drying box 1. The uppermost drying box 1 is provided with an exhaust pipe 5 for exhaust and a bulk material structure 11 for feeding materials into the drying box 1; In the present invention, there is a larger contact area between two adjacent drying boxes 1, so that the sieve holes 2 between the two adjacent drying boxes 1 can have a larger distribution area, that is, the internal space of each drying box 1 can be formed as follows. Figure 2 The conical shape shown is, specifically, the drying box 1 is shaped like a bucket, and the lower drying box 1 can be buckled on the bottom of the upper drying box 1, which facilitates the fluidization of the material in the drying box 1. Since the material will be screened starting from the inside of the uppermost drying box 1, the size of the multiple sieve holes 2 can be reduced from top to bottom, so that a step-by-step screening operation can be achieved. The air inlet pipe 1 3 passes through each drying box 1, and the air inlet 4 on each drying box 1 can achieve the effect of transmitting high-temperature airflow to the lowest point inside each drying box 1, and facilitate the airflow to be transported from bottom to top in the middle of the drying box 1. The multiple air inlets 4 on the uppermost drying box 1 can be directly opened at the top position of the air inlet pipe 1 3. During use, the bulk structure 11 is used to diffuse the material into the uppermost drying box 1, and the material gathers at the lowest point of the uppermost drying box 1. The air inlet pipe 1-3 introduces the high-temperature airflow into each drying box 1 through a plurality of air inlets 4. The airflow in the uppermost drying box 1 blows the material upward, and after rising to the highest point, the material diffuses to the surroundings, and then slides along the inner wall of the drying box 1 again to the vicinity of the air inlet 4 and rises again with the help of the airflow, thereby causing the material to undergo fluidized drying treatment in the drying box 1. Smaller particles of material in the drying process can fall into the adjacent drying box 1 through the sieve holes 2, and the airflow in the adjacent drying box 1 will also fluidize this part of the material, thereby causing the material to start screening and drying from the inside of the uppermost drying box 1, and as the material circulates and fluidizes, smaller particles of material can naturally be screened out and fall through the sieve holes 2, thereby realizing the screening and separation of the material after passing through multiple drying boxes 1, and at the same time, the fluidized drying operation of the material will be carried out in each drying box 1; It should be noted that the fluidization and screening of the material in the drying box 1 are carried out simultaneously, which can not only facilitate the discharge of smaller particles to avoid obstruction, but also facilitate the circulation of the material for hanging and drying. Since the exhaust duct 5 is installed on the uppermost drying box 1, the high-temperature airflow can flow upward in several drying boxes 1. In this way, the airflow can be used to conveniently blow away large particles blocking the sieve holes 2, thereby improving the flowability of the sieve holes 2. By adopting the method of blowing the material, the material is made to circulate and fluidize in the drying box 1, so that the hot air flow can be in uniform and comprehensive contact with the material, which is convenient for fast and effective drying of the material. At the same time, the fluidized drying method can keep the material in a suspended state for a long time and multiple times; by using the method of continuous movement of the material on the basis of fluidized drying of the material, the material is made to pass through a number of sieve holes 2 repeatedly, which can avoid the obstruction of large particles to small particles, and facilitate the improvement of screening effect; by using the fluidized movement of the material, the drying work and the screening work are combined, which not only improves the material processing effect, but also realizes the multi-functional working mode of one machine. At the same time, since the material in each drying box 1 can be fluidized independently, the screened material can be dried separately, so that the drying work is continued in the entire screening process of the material; since the drying and screening of the material are carried out simultaneously, there is no need to perform secondary drying treatment on the screened material, which simplifies the drying steps.

[0019] Furthermore, a collecting chamber 6 is provided at the bottom of each drying box 1. The collecting chamber 6 is connected to the drying box 1, and the communication position between the collecting chamber 6 and the drying box 1 is blocked by a sealing plate 7. A discharge pipe 8 for discharging material is provided at the bottom of each collecting chamber 6. Each sealing plate 7 is connected by a connecting rod 9, and the connecting rod 9 is pushed up and down by a cylinder 10; When the material in the drying box 1 is screened and dried, it needs to be discharged in time. To achieve this function, the material fluidization movement mode is used. During the normal material processing process, the sealing plate 7 blocks the connection position between the drying box 1 and the collecting chamber 6. At this time, the material cannot enter the collecting chamber 6. When the material processing is completed, the cylinder 10 is used to push the connecting rod 9 to move, so that the sealing plate 7 on each drying box 1 moves toward the inside of the collecting chamber 6 or moves to the inside of the drying box 1, so that the sealing plate 7 no longer blocks the connection position between the drying box 1 and the collecting chamber 6, and the material can naturally enter the collecting chamber 6 and be discharged through the discharge pipe 8. The material screened in each drying box 1 is output through an independent discharge pipe 8. When the material is discharged, the cylinder 10 drives each sealing plate 7 to reset through the connecting rod 9.

[0020] Furthermore, the bulk material structure 11 includes a base 12 and a plurality of circular rings 13. The plurality of circular rings 13 are located outside the base 12 and are arranged in sequence. There are slits for bulk material between the base 12 and the innermost circular ring 13 and between two adjacent circular rings 13. By utilizing the arrangement of the base 12 and the plurality of circular rings 13, multiple circles of slits can be formed from the inside to the outside. Therefore, when the material is transported to the base 12 and the innermost circular ring 13 or between two adjacent circular rings 13, the material will scatter downward through the gap. At this time, the slits will cause the material to form multiple circles of rings and sequentially arranged material curtains. This can facilitate the uniform introduction of the material, avoid mutual obstruction between the materials when the materials are introduced in piles, and facilitate the diffusion treatment of the material when loading. In addition, this structural method can also prevent the materials from sticking to each other and agglomerating when entering the drying box 1, and avoid the agglomerated materials from directly clogging the air inlet 4 and causing the equipment to be unable to use normally.

[0021] Furthermore, there are transmission wheels 15 for transmission between the base 12 and the adjacent rings 13, and between two adjacent rings 13. The transmission wheels 15 are supported by the support body 14. The transmission wheel 15 is used to transmit the power between the base 12 and the adjacent circular ring 13, and between two adjacent circular rings 13, thereby causing the base 12 and the adjacent circular ring 13, and between two adjacent circular rings 13 to move relative to each other, that is, the two side walls of the slit move relative to each other synchronously. In this way, the bulk material can be destroyed, and the bulk material can be prevented from continuously accumulating on the bulk material structure 11. At the same time, this movement method can facilitate the uniform distribution of more material at the slit position, so that all areas of the circular slit can achieve the bulk material function; the support body 14 can be used to support the transmission wheel 15, and in order to prevent the material from accumulating on the support body 14, the support body 14 can be set to be conical; In some embodiments, the following structures can be provided on both sides of the slit: Figure 9 The inclined ridges shown in the figure are in opposite directions, so that when the two side walls of the slit move relative to each other, the material can be guided and the bulk material can be destroyed. Since the two side walls of the slit move relative to each other and the inclined directions of the ridges on the two side walls are opposite, the shear-like destruction effect of the ridges on the two side walls on the bulk material can be achieved.

[0022] Furthermore, two stop edges 16 are provided on the outer wall of the base 12 and the inner and outer walls of each ring 13. The two stop edges 16 are distributed up and down and are used to limit the transmission wheel 15. Part of the transmission wheel 15 is located between the two stop edges 16. The two stop edges 16 can support the transmission wheel 15, so that the multiple rings 13 can support each other through the multiple transmission wheels 15 and move in opposite directions synchronously, without the need to set up a separate support structure for each ring 13; in order to avoid material deposition on the stop edge 16, the stop edge 16 can be set at an angle.

[0023] Furthermore, a rolling wheel 17 is provided at the bottom of each transmission wheel 15. The rolling wheel 17 is used to roll the material in the slit. The rolling wheel 17 is fixedly connected to the support body 14 through a connecting plate 18. The rolling wheel 17 is composed of two conical wheels, which are respectively used in conjunction with the base 12 and the ring 13 or two adjacent rings 13 on both sides of the slit; When the two side walls of the slit move relative to each other, the two side walls will use the material to drive the two conical wheels on the rolling wheel 17 to rotate synchronously in the opposite direction, thereby achieving a rolling and discharging effect on the materials on the two side walls moving in the opposite direction, which facilitates and accelerates the material dispersing work.

[0024] Furthermore, the bulk material structure 11 further includes a buckle cover 19 buckled on the outside of the plurality of rings 13, and the support body 14 is fixedly connected to the buckle cover 19. A vertical pipe 20 is provided on the buckle cover 19, and a feed channel 21 is obliquely provided on the vertical pipe 20. After the feeding is completed, the opening of the feed channel 21 is closed. An air intake pipe 22 is provided in the middle of the vertical pipe 20, and the air intake pipe 22 passes through the vertical pipe 20 and the base 12. An air guide plate 23 is provided at the bottom opening of the air intake pipe 22. A plurality of auxiliary air holes 24 are provided on the outer wall of the air intake pipe 22 inside the vertical pipe 20. The vertical pipe 20 passes through the uppermost drying box 1, and the buckle cover 19 and the feeding channel 21 are respectively located on the inner and outer sides of the uppermost drying box 1. The material can be introduced into the slit in the buckle cover 19 through the feeding channel 21 and the vertical pipe 20; the high-temperature airflow in the second air inlet pipe 22 can diffuse horizontally to the surroundings through the bottom opening of the second air inlet pipe 22 and the air guide plate 23. At this time, the airflow can blow and preliminarily dry the bulk material, and the blown material can be scattered toward the inner wall of the uppermost drying box 1, thereby helping the material to quickly form a fluidized state during feeding; the high-temperature airflow in the second air inlet pipe 22 can be simultaneously introduced into the vertical pipe 20 using a plurality of auxiliary air holes 24. At this time, since the feeding channel 21 is closed after the loading is completed, the high-temperature airflow in the vertical pipe 20 will flow downward and pneumatically blow and feed the buckle cover 19 and the material in the slit, thereby helping the material to pass through the slit and be discharged; The second air intake pipe 22 is connected to the base 12. The second air intake pipe 22 can directly drive the base 12 to rotate. By using a plurality of transmission wheels 15, the plurality of rings 13 can be moved synchronously. The second air intake pipe 22 can be powered by a motor.

[0025] Furthermore, a core column 25 connected to the air guide plate 23 is provided in the second air intake pipe 22, and a fixed cover 26 is provided on the top of the second air intake pipe 22. The fixed cover 26 is fixed relative to the feed channel 21, and the second air intake pipe 22 rotates on the fixed cover 26. The fixed cover 26 is connected to the air supply pipe 27. The position of the core column 25 on the fixed cover 26 can be adjusted; Since the air intake pipe 22 is in motion, if the air supply pipe 27 is directly connected to the air intake pipe 22, the air supply pipe 27 will also be in motion, so it cannot be connected to an external air pump or other structure. Therefore, the fixed cover 26 is used to realize the air supply of the static air supply pipe 27 to the dynamic air intake pipe 22, and at the same time, the fixed cover 26 can support the air guide plate 23 through the core column 25; the core column 25 and the fixed cover 26 can be connected by bolts or other means. When the position of the core column 25 on the fixed cover 26 changes, the distance between the air guide plate 23 and the bottom opening of the air intake pipe 22 changes, thereby increasing the exhaust volume at the bottom of the air intake pipe 22, making it convenient to adjust the exhaust volume of the secondary air hole 24 synchronously.

[0026] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A starch drying and screening device, characterized in that: The apparatus comprises a plurality of drying boxes and an air inlet pipe 1, wherein the drying boxes are arranged sequentially from top to bottom, and adjacent drying boxes are connected by a plurality of sieve holes, and the size of the sieve holes decreases sequentially from top to bottom. The top of the air inlet pipe 1 passes through the plurality of drying boxes sequentially from bottom to top and extends to the bottom of the topmost drying box. The air inlet pipe 1 is connected to each of the drying boxes via a plurality of air inlets located at the bottom of each drying box. The uppermost drying box is provided with an exhaust pipe for exhausting gas and a bulk material structure for feeding materials into the drying box.

2. A starch drying and screening device according to claim 1, characterized in that: A collecting chamber is provided at the bottom of each drying box, the collecting chamber is communicated with the drying box, and the communication position between the collecting chamber and the drying box is blocked by a sealing plate, and a discharge pipe for discharging material is provided at the bottom of each collecting chamber; The sealing plates are connected by connecting rods, and the connecting rods are pushed up and down by cylinders.

3. A starch drying and screening device according to claim 1, characterized in that: The bulk material structure includes a base and several circular rings, which are all located outside the base and are arranged in sequence. There are slits for bulk material between the base and the innermost circular ring and between two adjacent circular rings.

4. A starch drying and screening device according to claim 3, characterized in that: A transmission wheel for transmission is provided between the base and the adjacent circular rings, and between two adjacent circular rings, and the transmission wheel is supported by a supporting body.

5. A starch drying and screening device according to claim 4, characterized in that: Two retaining edges are provided on the outer wall of the base and the inner and outer walls of each of the circular rings. The two retaining edges are distributed up and down and are used to limit the transmission wheel.

6. A starch drying and screening device according to claim 5, characterized in that: A rolling wheel is provided at the bottom of each transmission wheel, and the rolling wheel is used to roll the material in the slit, and the rolling wheel is fixedly connected to the support body through a connecting plate; Wherein, the rolling wheel is composed of two conical wheels, and the two conical wheels are respectively used in conjunction with the base and the ring on both sides of the slit or the two adjacent rings.

7. A starch drying and screening device according to claim 6, characterized in that: The bulk material structure further includes a buckle cover buckled on the outer sides of the plurality of circular rings, and the support body is fixedly connected to the buckle cover, the buckle cover is connected to a vertical pipe, the vertical pipe is obliquely provided with a feed channel, and the feed channel is closed after the feeding is completed; An air intake pipe 2 is provided in the middle of the vertical pipe, and the air intake pipe 2 passes through the vertical pipe and the base. An air guide plate is provided at the bottom opening of the air intake pipe 2, and a plurality of auxiliary air holes are opened on the outer wall of the air intake pipe 2 inside the vertical pipe.

8. A starch drying and screening device according to claim 7, characterized in that: The second air intake pipe is provided with a core column connected to the air guide plate, the top of the second air intake pipe is provided with a fixed cover, and the fixed cover is relatively fixed to the feed channel, the second air intake pipe rotates on the fixed cover, and the fixed cover is connected to the air supply pipe; Wherein, the position of the core column on the fixed cover can be adjusted.

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