Crude starch drying and recycling airflow separation device

Abstract

The utility model relates to an airflow separation device for drying and recovering crude starch, which is characterized in that the lower part of a cylindrical shell is provided with a feed pipe extending into the cylindrical shell, and the upper end of the feed pipe is provided with a double-cone disperser; the rotary suction assembly comprises a buffer cylinder and a rotary suction impeller which are coaxially mounted at the upper end of the cylindrical shell, the lower end of the buffer cylinder is communicated with the cylindrical shell through a round hole, a discharging pipe is arranged in the middle of the side wall of the buffer cylinder, the rotary suction impeller is coaxially arranged at the upper end of the cylindrical shell, and a main shaft of the rotary suction impeller is upwards connected with a motor at the upper end of the buffer cylinder; according to the device, dried starch is axially sucked into the cylindrical shell through the feeding pipe and is primarily impacted and crushed by the double-cone dispersing device, then the dried starch is sucked into the rotary suction impeller and is further crushed under the action of the blades and the triangular crushing teeth, and the starch is discharged from the discharging pipe after being subjected to three-stage sufficient crushing. The problem that a large amount of residual coarse-particle starch enters a vibrating screen is avoided, frequent recycling and crushing are not needed, the coarse-particle starch is returned to a drying system, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of modified starch production, and in particular to a crude starch drying and recovery airflow separation device. Background Technology

[0002] The production process of modified starch involves reconfiguring the produced starch into starch slurry, adding it to a reaction tank, heating and stirring it for a certain period, and then refining, dehydrating, drying, and packaging it to produce the finished product. The drying process of modified starch mainly uses airflow drying. During airflow drying, the starch is fed into a cyclone separator, and after separation, it enters a vibrating screen. The vibrating screen separates the coarse starch particles, obtaining high-quality fine starch. For details, refer to the coarse starch crushing and recovery system disclosed in utility model application number 202323228394X. The problem with this crushing and recovery system is that during full-load airflow drying, coarse starch particles remain. After cyclone separation, a large amount of these particles accumulate in the vibrating screen, requiring frequent recovery and re-crushing before being returned to the drying system for re-drying and recovery. This increases the number of steps and makes the operation cumbersome, requiring improvement. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a crude starch drying and recovery airflow separation device.

[0004] The technical solution of this utility model is: a crude starch drying and recovery airflow separation device, including a cylindrical shell and a vortex suction assembly installed on the upper part of the cylindrical shell. The lower part of the cylindrical shell is provided with a feed pipe extending into the cylindrical shell. The outer end of the feed pipe is provided with a flange. The vertical section of the feed pipe is arranged coaxially with the cylindrical shell. The upper end of the feed pipe is equipped with a double cone diffuser through a crossbar. The crossbar is fixedly connected to the outer side of the double cone diffuser. The taper of the upper cone of the double cone diffuser is greater than the taper of the lower cone. The vortex suction assembly includes a buffer cylinder and a vortex suction impeller coaxially installed on the upper end of the cylindrical shell. The lower end of the buffer cylinder is connected to the cylindrical shell through a round hole. The upper port of the cylindrical shell is provided with a cover plate. The round hole is located in the center of the cover plate. A sealing plate is provided at the upper end. A discharge pipe is provided radially in the middle of the side wall. The vortex suction impeller is coaxially arranged at the upper end of the cylindrical shell. The main shaft of the vortex suction impeller passes upward through the buffer cylinder and is coaxially fixedly connected to the output shaft of the motor at the upper end of the buffer cylinder.

[0005] Preferably, the vortex impeller includes a base plate and a support ring coaxially mounted on the lower end of the main shaft. A certain distance is provided between the base plate and the support ring. Several blades are evenly distributed between the edges of the base plate and the support ring, and triangular breaking teeth are provided at the upper end of the blades. The edges of the base plate and the support ring are provided with slots, and the blades are engaged in the slots.

[0006] Preferably, the lower end of the buffer cylinder is provided with a tapered annular plate, and an air-guiding chamber is formed between the annular plate and the supporting base plate of the buffer cylinder. The surface of the annular plate is densely covered with small air-guiding holes that communicate with the air-guiding chamber, and a main air-guiding hole that communicates with the air-guiding chamber is provided on the side wall of the buffer cylinder. The size of the main air-guiding hole is larger than the size of the small air-guiding holes.

[0007] Preferably, an annular groove is provided between the support ring and the support base plate, the position of the air duct hole corresponds to the position of the annular groove, and the annular groove is connected to the air duct hole.

[0008] Preferably, the sealing plate of the buffer cylinder is provided with a motor support cylinder, the size of which is smaller than that of the buffer cylinder, and the motor is installed on the upper end face of the motor support cylinder.

[0009] Preferably, a bushing fitted onto the main shaft is installed inside the buffer cylinder, a rubber sealing sleeve is installed between the lower end of the bushing and the main shaft, and bearings are provided at both ends of the bushing, with the bearings connected to the main shaft.

[0010] Preferably, the lower end of the bushing is provided with a fixing frame, which includes a collar fixedly fitted on the lower end of the bushing and radial rods evenly distributed on the collar. At least three radial rods are provided, and the outer ends of the radial rods are fixedly connected to the inner side of the buffer cylinder.

[0011] The beneficial technical effects of this utility model are:

[0012] (1) The device axially sucks the dried starch into the cylindrical shell through the feed pipe. The double cone disperser performs primary impact crushing on it, and then it is sucked into the vortex impeller. Under the action of the blades and triangular crushing teeth, it is further crushed. After the starch is fully crushed in three stages, it is discharged from the discharge pipe, avoiding the problem of a large amount of residual coarse starch entering the vibrating screen. It is no longer necessary to frequently recycle and crush it back into the drying system, which simplifies the operation process and helps to improve the operation efficiency.

[0013] (2) The air duct of the device is connected to the outside air through the main air duct, and then the air is discharged from the air duct small hole on the bottom of the air duct to the annular groove on the upper part of the vortex impeller, providing reverse airflow to the upper part of the vortex impeller, avoiding starch blockage between the upper part of the vortex impeller and the end cover of the cylindrical shell, ensuring that the vortex impeller can be in a stable working state for a long time and improving working efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the device connected to the cyclone separator;

[0015] Figure 2 It is a three-dimensional structural test bench for this device;

[0016] Figure 3 yes Figure 2 AA-shaped cross-sectional structural test bench;

[0017] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0018] Figure 5 This is a three-dimensional structural diagram of a vortex impeller;

[0019] Figure 6 This is a schematic diagram of the three-dimensional structure of the buffer cylinder.

[0020] In the figure, 11. Cylindrical shell, 12. Feed pipe, 13. Double cone diffuser, 131. Crossbar, 14. Buffer cylinder, 141. Discharge pipe, 15. Swirl impeller, 151. Main shaft, 152. Base plate, 153. Support ring, 154. Blade, 155. Triangular crushing tooth, 16. Motor, 161. Motor support cylinder, 171. Circular ring plate, 172. Support base plate, 173. Exhaust chamber, 174. Exhaust hole, 175. Exhaust main hole, 18. Bushing, 19. Collar, 191. Radial rod, 20. Cyclone separator, 21. Storage tank. Detailed Implementation

[0021] Example 1, see appendix Figure 1-3 5-6, a coarse starch drying and recovery airflow separation device, comprising a cylindrical shell 11 and a vortex assembly installed on the upper part of the cylindrical shell. The lower part of the cylindrical shell 11 is provided with a feed pipe 12 extending into the cylindrical shell 11. The vertical section of the feed pipe is coaxially arranged with the cylindrical shell. A double-cone disperser 13 is installed at the upper end of the feed pipe via a crossbar 131. Starch enters the cylindrical shell 11 axially from the feed pipe 12 with the airflow, and then axially impacts the surface of the double-cone disperser 13, producing a crushing effect. Simultaneously, the conical structure of the double-cone disperser 13 can uniformly disperse the airflow, allowing the starch airflow to uniformly enter the vortex impeller 15, improving the uniformity of crushing. The taper of the upper cone of the body disperser 13 is greater than that of the lower cone; the vortex suction assembly includes a buffer cylinder 14 and a vortex suction impeller 15 coaxially mounted on the upper end of the cylindrical shell 11. The lower end of the buffer cylinder 14 is connected to the cylindrical shell 11 through a circular hole, and a sealing plate is provided at the upper end. A discharge pipe 141 is provided in the middle of the side wall. The vortex suction impeller 15 is coaxially arranged at the upper end of the cylindrical shell 11. The main shaft 151 of the vortex suction impeller 15 passes upward through the buffer cylinder and is connected to the motor 16 at the upper end of the buffer cylinder. A storage tank 21 is provided at the lower end of the cylindrical shell 11. Valves are provided at both ends of the storage pipe. During the crushing and separation process of this device, some of the blocky starch slides down the cylindrical shell 11 into the storage tank 21.

[0022] The vortex impeller 15 includes a base plate 152 and a support ring 153 coaxially mounted on the lower end of the main shaft 151. Several blades 154 are evenly distributed between the edges of the base plate and the support ring, and triangular crushing teeth 155 are provided at the upper end of the blades. When the starch passes through each blade 154 with the airflow, it is crushed. Then, when it passes upward with the airflow through the triangular crushing teeth 155, it is crushed again.

[0023] The sealing plate of the buffer cylinder 14 is provided with a motor support cylinder 161. The motor 16 is installed on the upper end face of the motor support cylinder 161. The motor support cylinder 161 is used to provide vibration damping for the motor 16 and reduce the impact of the vibration of the motor 16 itself on the entire device.

[0024] A bushing 18 is installed inside the buffer cylinder and fitted onto the main shaft 151. A rubber sealing sleeve is installed between the lower end of the bushing and the main shaft 151. The rubber sealing sleeve seals the bushing 18 and the lower end of the main shaft 151, preventing airflow from entering the bushing 18 and affecting the lubrication effect.

[0025] The lower end of the bushing 18 is provided with a fixing frame, which includes a collar 19 fixedly fitted on the lower end of the bushing 18 and radial rods 191 evenly distributed on the collar 19. The outer end of the radial rod is fixedly connected to the inner side of the buffer cylinder. The fixing frame with this structure can fix the bushing 18 from the bottom and improve the stability of the bushing 18.

[0026] When the device is working, the starter motor 16 drives the vortex impeller 15 to rotate on the upper part of the cylindrical shell 11, generating a suction force on the upper part of the cylindrical shell 11. A negative pressure is generated at the feed pipe 12, and the dried starch is axially drawn into the cylindrical shell 11 by the airflow through the feed pipe 12. The double cone disperser 13 performs primary impact crushing on the starch, and then it is drawn upward into the vortex impeller 15. Under the action of the blades 154 and the triangular crushing teeth 155, the starch is further crushed. After being fully crushed in three stages, the starch enters the buffer cylinder 14 and is then discharged from the discharge pipe 141 into the cyclone separator 20, thus avoiding the problem of a large amount of residual coarse starch particles entering the vibrating screen.

[0027] Example 2, see appendix Figure 3-4This embodiment is basically the same as Embodiment 1, except that: the lower end of the buffer cylinder 14 is provided with a tapered annular plate 171, and an annular air-guiding chamber 173 is formed between the annular plate and the supporting base plate 172 of the buffer cylinder 14. The surface of the annular plate 171 is densely covered with air-guiding holes 174 that communicate with the air-guiding chamber 173, and an air-guiding main hole 175 that communicates with the air-guiding chamber 173 is provided on the side wall of the buffer cylinder 14. The air-guiding chamber 173 is connected to the outside air through the air-guiding main hole 175. An annular groove is provided between the supporting ring 153 and the supporting base plate 172. The position of the air-guiding holes 174 corresponds to the position of the annular groove. After the airflow enters the air-guiding chamber 173, it is discharged from the air-guiding holes 174 and enters the annular groove.

[0028] When the device is working, the air intake chamber 173 is connected to the outside air through the main air intake hole 175. During the process of the swirling impeller 15 applying suction force to the cylindrical shell 11, a negative pressure is generated inside the cylindrical shell 11. The negative pressure acts from the annular groove to each air intake hole 174, and a negative pressure is generated in the air intake chamber 173. Outdoor air is drawn in from the main air intake hole 175 and discharged from the air intake holes 174 into the annular groove on the upper part of the swirling impeller 15. This provides a reverse airflow to the upper part of the swirling impeller 15, avoids starch blockage between the upper part of the swirling impeller and the end cap of the cylindrical shell 11, and ensures that the swirling impeller 15 can be in a stable working state for a long time.

Claims

1. A crude starch drying and recovery airflow separation device, characterized in that: The device includes a cylindrical shell and a vortex suction assembly mounted on the upper part of the cylindrical shell. The lower part of the cylindrical shell is provided with a feed pipe extending into the cylindrical shell. The vertical section of the feed pipe is arranged coaxially with the cylindrical shell. A double-cone diffuser is mounted on the upper end of the feed pipe via a crossbar. The taper of the upper cone of the double-cone diffuser is greater than the taper of the lower cone. The vortex suction assembly includes a buffer cylinder and a vortex suction impeller coaxially mounted on the upper end of the cylindrical shell. The lower end of the buffer cylinder is connected to the cylindrical shell through a circular hole, and the upper end is provided with a sealing plate. A discharge pipe is provided in the middle of the side wall. The vortex suction impeller is coaxially arranged at the upper end of the cylindrical shell. The main shaft of the vortex suction impeller passes upward through the buffer cylinder and is connected to a motor at the upper end of the buffer cylinder.

2. The crude starch drying and recovery airflow separation device according to claim 1, characterized in that: The vortex impeller includes a base plate and a support ring coaxially mounted on the lower end of the main shaft. Several blades are evenly distributed between the edges of the base plate and the support ring, and triangular crushing teeth are provided at the upper end of the blades.

3. The crude starch drying and recovery airflow separation device according to claim 2, characterized in that: The lower end of the buffer cylinder is provided with a tapered annular plate, and an air-guiding chamber is formed between the annular plate and the supporting base plate of the buffer cylinder. The surface of the annular plate is densely covered with air-guiding holes that communicate with the air-guiding chamber, and a main air-guiding hole that communicates with the air-guiding chamber is provided on the side wall of the buffer cylinder.

4. The crude starch drying and recovery airflow separation device according to claim 3, characterized in that: An annular groove is provided between the support ring and the support base plate, and the position of the air duct hole corresponds to the position of the annular groove.

5. The crude starch drying and recovery airflow separation device according to claim 1, characterized in that: The sealing plate of the buffer cylinder is provided with a motor support cylinder, and the motor is installed on the upper end face of the motor support cylinder.

6. The crude starch drying and recovery airflow separation device according to claim 5, characterized in that: The buffer cylinder contains a bushing fitted onto the main shaft, and a rubber sealing sleeve is installed between the lower end of the bushing and the main shaft.

7. The crude starch drying and recovery airflow separation device according to claim 6, characterized in that: The lower end of the bushing is provided with a fixing frame, which includes a collar fixedly fitted on the lower end of the bushing and radial rods evenly distributed on the collar. The outer end of the radial rods is fixedly connected to the inner side of the buffer cylinder.

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