A dust purification device in a corn starch product processing process

Abstract

The present application relates to the technical field of purification equipment, and particularly relates to a dust purification device in a corn starch product processing process, which comprises an outer box body, a plurality of air inlet pipes arranged on the side wall of the outer box body and a negative pressure pipe communicated with the top of the outer box body; a separation unit for gas-liquid separation is arranged in the middle of the outer box body, an isolation round cover one is arranged outside the separation unit, and an isolation round cover two is arranged outside the isolation round cover one; by adopting the mode of water adsorbing dust, the hydrophilicity of starch dust is utilized to make the dust quickly dissolve in water, the purification effect is improved, the gas has good flowability, the purification efficiency is greatly improved, the airflow is made to pulse flow by using air pressure and water pressure, the water is made to boil and flow, the water can be randomly scattered in the ascending channel and the descending channel, the adsorption effect of water on the dust in the gas is improved, and thus the purification effect is improved.

Description

Technical Field

[0001] This invention relates to the technical field of purification equipment, and in particular to a dust purification device for the processing of corn starch products. Background Technology

[0002] Dust generation occurs throughout several core processes in corn starch processing, such as cleaning, crushing, degerming, fine grinding of raw corn, starch sieving, drying, and finished product packaging. Due to mechanical forces and high-speed material movement, fine starch particles are easily released into the air, forming industrial dust. This dust not only contains starch particles but may also contain small amounts of impurities such as bran fibers. Corn starch dust is an organic dust, characterized by its small particle size, light weight, and high risk of dust explosion when exposed to an open flame at certain concentrations, posing a serious threat to safe production in factories.

[0003] To address the aforementioned dust problem, existing industrial production lines generally employ dust removal and purification devices. Currently, the mainstream technical solutions are mostly based on the principle of filtration and separation. This involves using a fan to introduce dust-laden airflow into the equipment, where various filter media, such as filter bags, filter cartridges, or filter elements, efficiently filter the air, trapping dust on their surface. The clean air is then discharged into the atmosphere or reused in the workshop. However, corn starch dust has strong hygroscopic and adhesive properties, and its particle size distribution is very fine. These characteristics make it easy for dust to embed and clog the pores of the filter media, causing the dust layer on the filter surface to continuously thicken. This significantly increases the operating resistance of the equipment. To maintain the continuous purification capacity and normal airflow of the device, operators must frequently perform pulse backflushing cleaning of the filter screen or shut down the machine for disassembly and cleaning. In severe cases, it may even be necessary to replace the entire expensive filter element. This high-frequency maintenance not only consumes a large amount of manpower for cleaning and maintenance but also increases the replacement cost of filter media and other materials. More importantly, frequent shutdowns for maintenance disrupt the continuous production process and reduce production efficiency. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a dust purification device for the processing of corn starch products, the specific technical solution of which is as follows: The present invention provides a dust purification device for corn starch product processing, comprising an outer casing, a plurality of air inlet pipes disposed on the side wall of the outer casing, and a negative pressure pipe connected to the top of the outer casing; A separation unit for gas-liquid separation is provided in the middle of the outer casing. An isolation dome is provided on the outside of the separation unit, and an isolation dome is provided on the outside of the isolation dome. The bottom of the isolation dome is located in the middle of the isolation dome and forms an air guiding channel. The top of the isolation dome bypasses the top of the isolation dome and is fixedly connected to the separation unit. The outer wall of the isolation dome is connected to the inner wall of the outer casing by an isolation plate. The isolation plate divides the internal space of the outer casing into a lower water storage chamber and an upper exhaust chamber. In the water storage chamber, the space between the isolation dome and the outer casing is set as an air inlet chamber. The space between the inner wall of the isolation dome and the outer wall of the isolation dome is set as an ascending channel. The space between the inner wall of the isolation dome and the outer wall of the separation unit is set as a descending channel. The air inlet pipe is connected to the air inlet chamber. External dust-laden air flows sequentially through the air inlet pipe, air inlet chamber, air guiding channel, ascending channel, descending channel, separation unit, and negative pressure pipe.

[0005] Furthermore, the separation unit includes a fixed cylinder on the outer side and a rotating cylinder on the inner side. The isolation shroud is connected to the fixed cylinder. The openings of the fixed cylinder and the rotating cylinder both face downwards. The rotating cylinder rotates inside the fixed cylinder. Several openings are provided on the outer wall of the rotating cylinder. The rotating cylinder is connected to the descending channel through several conveying pipes. An exhaust pipe extending into the exhaust chamber is connected to the top of the rotating cylinder.

[0006] Furthermore, an inner sleeve ring is provided on the inner wall of the rotating cylinder, and a baffle is provided on the inner side of the inner sleeve ring. The inner sleeve ring and the baffle are connected by several fan blades. Several through-holes are provided on the side wall of the rotating cylinder corresponding to the inner sleeve ring, and a baffle plate is provided on the outer wall of the rotating cylinder to block the several through-holes.

[0007] Furthermore, a support ring is provided at the bottom of the rotating drum, the support ring is fixed relative to the fixed drum, the rotating drum rotates on the support ring, one end of the conveying pipe is connected to the support ring, the other end of the conveying pipe passes through the fixed drum and is connected to the descending channel, and a plurality of dispersing ports are provided on the inner wall of the support ring, the dispersing ports being arranged corresponding to the fan blades.

[0008] Furthermore, an annular pipe is provided on the outer wall of the second isolation dome. The annular pipe is located in the water storage chamber. An annular opening is provided on the outer wall of the annular pipe, which faces the inner wall of the outer box. The air inlet pipe is connected to the annular pipe.

[0009] Furthermore, a second annular pipe is provided on the inner wall of the outer casing corresponding to the first annular pipe, and a second annular opening is provided at the bottom of the second annular pipe for draining water downwards and forming an annular water curtain.

[0010] Furthermore, the outer wall of the second isolation shield is provided with a collection groove that communicates with the rising channel, and the collection groove is connected to the second annular pipe through a number of downwardly inclined drainage pipes.

[0011] Furthermore, a number of guide plates are staggered in the descent channel. The guide plates are inclined downwards, and adjacent guide plates are respectively fixed on the separation unit and the inner wall of the isolation dome.

[0012] The beneficial effects of this invention are as follows: By using water to adsorb dust, the hydrophilicity of starch dust allows it to dissolve quickly in water, improving the purification effect. Simultaneously, the gas has good flowability, further enhancing purification efficiency. Furthermore, the use of air and water pressure to create pulsed airflow agitates the water, causing it to boil and disperse freely within the rising and falling channels, thus improving the water's adsorption of dust from the gas. This enhances the purification effect and ensures stable long-term operation of the equipment without frequent maintenance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a dust purification device used in the processing of corn starch products. Figure 2 for Figure 1 Schematic diagram of the internal structure of the inner and outer casings; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle separation unit; Figure 4 for Figure 3 Schematic diagram of the intermediate transfer cylinder; Figure 5 for Figure 3 Schematic diagram of the middle support ring; Figure 6 for Figure 2 Schematic diagram of the structure of the central ring pipe; Figure 7 for Figure 2 Schematic diagram of the structure of the second central ring pipe and the collection tank; Figure 8 for Figure 7 A magnified view of the structure at point A in the middle; Figure label: 1. Outer casing; 2. Inlet pipe; 3. Negative pressure pipe; 4. Separation unit; 5. Isolation shroud one; 6. Isolation shroud two; 7. Isolation plate; 8. Inlet chamber; 9. Air guide channel; 10. Ascending channel; 11. Descending channel; 12. Fixed cylinder; 13. Rotating cylinder; 14. Port one; 15. Conveying pipe; 16. Exhaust pipe; 17. Inner ring; 18. Fan blade; 19. Baffle; 20. Port two; 21. Baffle plate; 22. Support ring; 23. Ring groove; 24. Dispersion port; 25. Ring pipe one; 26. Ring port one; 27. Ring pipe two; 28. Ring port two; 29. ​​Collection tank; 30. Drainage pipe; 31. Guide plate. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0018] like Figures 1 to 8 As shown, a dust purification device for corn starch product processing according to the present invention includes an outer casing 1, a plurality of air inlet pipes 2 disposed on the side wall of the outer casing 1, and a negative pressure pipe 3 connected to the top of the outer casing 1. A separation unit 4 for gas-liquid separation is provided in the middle of the outer casing 1. An isolation dome 5 is provided on the outside of the separation unit 4, and an isolation dome 6 is provided on the outside of the isolation dome 5. The bottom of the isolation dome 6 is located in the middle of the isolation dome 5 and forms a gas guiding channel 9. The top of the isolation dome 6 bypasses the top of the isolation dome 5 and is fixedly connected to the separation unit 4. The outer wall of the isolation dome 6 is connected to the inner wall of the outer casing 1 by an isolation plate 7. The isolation plate 7 divides the internal space of the outer casing 1 into a lower water storage area. The chamber and the upper exhaust chamber are located in the water storage chamber. The space between the isolation dome 2 6 and the outer casing 1 is set as the air inlet chamber 8. The space between the inner wall of the isolation dome 2 6 and the outer wall of the isolation dome 1 5 is set as the rising channel 10. The space between the inner wall of the isolation dome 1 5 and the outer wall of the separation unit 4 is set as the falling channel 11. The air inlet pipe 2 is connected to the air inlet chamber 8. The dusty air from outside flows through the air inlet pipe 2, the air inlet chamber 8, the air guide channel 9, the rising channel 10, the falling channel 11, the separation unit 4 and the negative pressure pipe 3 in sequence.

[0019] In this invention, several air inlet pipes 2 are arranged around the outer casing 1, so that dust-laden gas can be drawn into the outer casing 1 from multiple directions to achieve large-area dust removal. Of course, only one or a few air inlet pipes 2 can be opened at specific locations to achieve directional dust collection. The negative pressure pipe 3 is set at the top of the outer casing 1 and is connected to external fans, air pumps, etc., so that negative pressure is generated inside the negative pressure pipe 3 and inside the outer casing 1, and the external dust-laden gas is drawn into the outer casing 1 through the air inlet pipes 2 by means of the negative pressure.

[0020] Separation unit 4, isolation dome 5 and isolation dome 6 are arranged sequentially from the inside to the outside. Isolation dome 6 is supported by isolation disc 7, and separation unit 4 is supported by isolation dome 6. A connecting rod or other support structure can be added between isolation dome 5 and separation unit 4 to achieve the suspended support of separation unit 4, isolation dome 5 and isolation dome 6. Separation unit 4, isolation dome 6 and isolation disc 7 together divide the internal space of outer box 1, so that the purification of dust-containing gas is mainly concentrated on the lower side of separation unit 4, and the purified gas on the upper side of isolation disc 7 can be discharged through negative pressure pipe 3.

[0021] like Figure 2As shown, the isolation plate 7 is located on the upper side of the outer wall of the second isolation shield 6. The bottom of the second isolation shield 6 is located in the middle of the outer wall of the first isolation shield 5. The gap between the bottom of the second isolation shield 6 and the outer wall of the first isolation shield 5 is set as an air guide channel 9 to facilitate the connection between the air inlet chamber 8 and the rising channel 10 through the air guide channel 9. The rising channel 10 and the falling channel 11 can be connected to each other through the space at the top of the first isolation shield 5. Since the first isolation shield 5 is suspended, the area at the bottom of the air inlet chamber 8 near the bottom of the outer casing 1 and the area at the bottom of the falling channel 11 near the bottom of the outer casing 1 are connected to each other. A certain amount of water is stored in the water storage chamber, and the water level is higher than the connection position between the air guide channel 9, the falling channel 11 and the separation unit 4.

[0022] In operation, the negative pressure pipe 3 creates a negative pressure environment inside the outer casing 1. Dust-laden gas enters the intake chamber 8 through the intake pipe 2. Due to the pressure difference, the water level in the intake chamber 8 drops, and the gas volume increases. When the water level drops to the position of the air guide channel 9, the gas in the intake chamber 8 enters the rising channel 10 through the air guide channel 9. At this time, due to air pressure, the gas flow rate is relatively fast, and the gas carries a large amount of water, causing it to boil and flow in the descending channel 11. Simultaneously, when some air enters the rising channel 10 through the air guide channel 9, the pressure difference in the intake chamber 8 changes instantaneously, and the gas pressure on the water decreases instantaneously. At this point, the water level in the intake chamber 8 rises and exceeds the air guide channel 9, blocking it. As the negative pressure pipe 3 continues to pump air, the pressure difference in the intake chamber 8 increases again, suppressing the water level drop. When the water level falls below the air guide channel 9 again... The air in the intake chamber 8 enters the rising channel 10 again through the air guide channel 9. This process is repeated, causing the gas in the intake chamber 8 to repeatedly pass through the air guide channel 9 and enter the rising channel 10 in a pulsed manner. This pulsed airflow impacts the water, enabling the water to adsorb dust in the gas. At the same time, the airflow carries water, which boils and rises in the rising channel 10, bypassing the top of the isolation dome 5 and entering the falling channel 11. The gas and water in the falling channel 11 then descend. At this time, the gas and water in the rising channel 10 and the falling channel 11 can mix with each other. The water adsorbs the dust in the gas, and the boiling state of the water can greatly improve the adsorption effect. Some of the water and all the gas in the falling channel 11 that have undergone adsorption treatment will enter the separation unit 4. The separation unit 4 performs gas-liquid separation, thereby discharging the purified gas through the negative pressure pipe 3.

[0023] Since the bottom of the air inlet chamber 8 is connected to the bottom of the descending channel 11, the water that has completed the adsorption process and fallen in the descending channel 11 will mix with the original water in the outer casing 1. At this time, some of the dust-laden water will continue to flow downwards, while the remaining water will be sucked into the separation unit 4 along with the gas.

[0024] It should be noted that the negative pressure pipe 3 is connected to the exhaust chamber on the upper side of the outer casing 1, and the separation unit 4 is connected to the exhaust chamber. When the negative pressure pipe 3 draws out the air inside the outer casing 1, it will first create negative pressure inside the exhaust chamber and the separation unit 4. The water level in the separation unit 4 will rise, and the water level in the air intake chamber 8 will drop.

[0025] By using water to adsorb dust, the hydrophilicity of starch dust allows it to dissolve quickly in water, improving the purification effect. Simultaneously, the gas has good flowability, greatly enhancing purification efficiency. Furthermore, the use of air and water pressure to create pulsed airflow agitates the water, causing it to boil and disperse freely within the rising and falling channels 10 and 11, further improving the water's adsorption of dust from the gas. This enhances the purification effect and ensures stable long-term operation of the equipment without frequent maintenance.

[0026] Furthermore, the separation unit 4 includes a fixed cylinder 12 located on the outer side and a rotating cylinder 13 located on the inner side. The isolation cover 6 is connected to the fixed cylinder 12. The openings of the fixed cylinder 12 and the rotating cylinder 13 both face downwards. The rotating cylinder 13 rotates inside the fixed cylinder 12. Several openings 14 are provided on the outer wall of the rotating cylinder 13. The rotating cylinder 13 is connected to the descending channel 11 through several conveying pipes 15. An exhaust pipe 16 extending into the exhaust chamber is connected to the top of the rotating cylinder 13.

[0027] The bottoms of both the fixed cylinder 12 and the rotating cylinder 13 are connected to the interior of the outer casing 1. Therefore, water in the outer casing 1 can directly enter the separation unit 4 through the bottoms of the fixed cylinder 12 and the rotating cylinder 13. Initially, the water level in the separation unit 4 is higher than that in the conveying pipe 15. This allows the water level in the rotating cylinder 13 to rise directly and the water level outside the separation unit 4 to drop directly when the negative pressure pipe 3 is working. This prevents the separation unit 4 from being unable to fill with a large amount of water when air from the outside of the separation unit 4 directly enters the separation unit 4, thus preventing the effective separation of water and gas. Since the fixed cylinder 12 and the rotating cylinder 13 are connected through the port 14, the water levels in the fixed cylinder 12 and the rotating cylinder 13 will rise simultaneously under negative pressure.

[0028] During use, the negative pressure in the exhaust chamber is transmitted to the rotating drum 13 and the fixed drum 12 through the exhaust pipe 16. At this time, the water level in the fixed drum 12 and the rotating drum 13 rises, and the water in the outer casing 1 is replenished into the separation unit 4. When the gas and water in the descending channel 11 enter the rotating drum 13 through several conveying pipes 15, the rotating drum 13 contains a large amount of water and the water level is higher than the inlet 14. The rotating drum 13 is rotated, and the rotating drum 13 drives the water and gas inside to undergo centrifugal motion. At this time, the water re-adsorbs the dust in the gas, and due to the centrifugal effect, the gas will gather in the middle of the rotating drum 13, while the water and the dust particles in the water will gather towards the inner wall of the rotating drum 13, thereby achieving water-gas separation. The gas rises and is discharged through the exhaust pipe 16, while the particles adsorbed in the water can be introduced into the fixed drum 12 through the inlet 14 by means of centrifugal action, thereby achieving the separation of water, particles and gas.

[0029] Furthermore, an inner sleeve ring 17 is provided on the inner wall of the rotating cylinder 13, and a baffle 19 is provided on the inner side of the inner sleeve ring 17. The inner sleeve ring 17 and the baffle 19 are connected by several fan blades 18. Several through holes 20 are opened on the side wall of the rotating cylinder 13 corresponding to the inner sleeve ring 17. A baffle plate 21 for blocking the several through holes 20 is provided on the outer wall of the rotating cylinder 13.

[0030] An upward-opening annular space is formed between the inner ring 17 and the inner wall of the rotating cylinder 13. This annular space is connected to the inside of the fixed cylinder 12 through the second opening 20. The baffle 21 blocks the second opening 20 to prevent particles falling from the fixed cylinder 12 from entering the rotating cylinder 13 through the second opening 20. Furthermore, particles in the fixed cylinder 12 in a centrifugal state can naturally fall into this annular space and be discharged into the fixed cylinder 12 through the second opening 20 before reaching the height of the first opening 14.

[0031] The inner ring 17 and the baffle 19 provide an upward channel for the gas entering the rotating drum 13 from the descending channel 11. The gas rises in the form of bubbles, while simultaneously carrying water and flowing synchronously. The bubbles and water can act on several fan blades 18 and drive the rotating drum 13 to rotate, thereby providing power to the rotating drum 13.

[0032] Furthermore, a support ring 22 is provided at the bottom of the rotating drum 13. The support ring 22 is fixed relative to the fixed drum 12. The rotating drum 13 rotates on the support ring 22. One end of the conveying pipe 15 is connected to the support ring 22, and the other end of the conveying pipe 15 passes through the fixed drum 12 and is connected to the descending channel 11. Several dispersing ports 24 are opened on the inner wall of the support ring 22. The dispersing ports 24 are correspondingly arranged with the fan blades 18.

[0033] The support ring 22 can support the rotating drum 13. When the gas and water in the descending channel 11 enter the support ring 22 through the conveying pipe 15, the water and gas can be dispersed to the corresponding fan blades 18 through several dispersion ports 24, so that the water and gas are evenly dispersed. It also makes it easier to concentrate the force of the upward flowing gas and water on the fan blades 18 to the vicinity of the inner wall of the inner ring 17, thereby improving the force transmission effect.

[0034] Furthermore, an annular pipe 25 is provided on the outer wall of the isolation dome 2 6. The annular pipe 25 is located in the water storage chamber. An annular opening 26 is provided on the outer wall of the annular pipe 25 facing the inner wall of the outer box 1. The air inlet pipe 2 is connected to the annular pipe 25.

[0035] External dust-laden gas is introduced into the annular pipe 25 through the inlet pipe 2. The gas in the annular pipe 25 is dispersed into the inlet chamber 8 in a ring shape through the annular port 26, and the gas flows towards the inner wall of the outer casing 1. At this time, the dust particles in the gas have greater inertia and will accumulate near the inner wall of the outer casing 1, while the gas has relatively less inertia and will accumulate near the outer wall of the isolation dome 6. This achieves the initial separation of particles and gas, which facilitates the adsorption of particles by water. At the same time, since the distance between the particles and the air guide channel 9 is large, the amount of particles entering the rising channel 10 and the falling channel 11 can be reduced, thus improving the purification effect.

[0036] Furthermore, a second ring pipe 27 is provided on the inner wall of the outer casing 1 corresponding to the first ring pipe 25, and a second ring opening 28 is provided at the bottom of the second ring pipe 27 for downward drainage and forming an annular water curtain.

[0037] The second ring pipe 27 can be located above the first ring pipe 25. The water in the second ring pipe 27 can be discharged downward through the second ring opening 28, thus forming a water curtain effect near the inner wall of the outer casing 1. The particles discharged from the first ring opening 26 towards the inner wall of the outer casing 1 will be directly adsorbed by the water curtain, thereby achieving rapid absorption and separation, and preventing the particles from hitting the inner wall of the outer casing 1 and re-mixing with the gas when they bounce. When the particles are large and pass through the water curtain, the kinetic energy of the particles decreases. At this time, the water curtain can block the rebounding particles. The downward pushing force generated by the water curtain on the particles can accelerate their falling speed, thus facilitating the rapid integration of the particles into the water in the outer casing 1.

[0038] Furthermore, the outer wall of the isolation dome 26 is provided with a collection trough 29 that communicates with the rising channel 10, and the collection trough 29 is connected to the annular pipe 27 through a number of downwardly inclined drainage pipes 30.

[0039] When the water in the rising channel 10 is carried by the airflow and boils, some of the water will enter the collection tank 29. The water in the collection tank 29 can flow naturally into the ring pipe 27 along the diversion pipe 30, thereby realizing the water supply operation of the ring pipe 27.

[0040] Furthermore, a number of guide plates 31 are staggered in the descent channel 11. The guide plates 31 are inclined downward, and adjacent guide plates 31 are respectively fixed on the separation unit 4 and the inner wall of the isolation dome 5.

[0041] As the water and gas flow downward in the descending channel 11, several guide plates 31 can guide the gas and water, allowing the water to undergo multiple impacts and diffusions, thereby improving the water's adsorption effect on particulate matter in the gas, and also extending the falling path and time of the water and gas.

[0042] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dust purification device for corn starch product processing, characterized in that, It includes an outer casing, several air inlet pipes disposed on the side wall of the outer casing, and a negative pressure pipe connected to the top of the outer casing; A separation unit for gas-liquid separation is provided in the middle of the outer casing. An isolation dome is provided on the outside of the separation unit, and an isolation dome is provided on the outside of the isolation dome. The bottom of the isolation dome is located in the middle of the isolation dome and forms an air guiding channel. The top of the isolation dome bypasses the top of the isolation dome and is fixedly connected to the separation unit. The outer wall of the isolation dome is connected to the inner wall of the outer casing by an isolation plate. The isolation plate divides the internal space of the outer casing into a lower water storage chamber and an upper exhaust chamber. In the water storage chamber, the space between the isolation dome and the outer casing is set as an air inlet chamber. The space between the inner wall of the isolation dome and the outer wall of the isolation dome is set as an ascending channel. The space between the inner wall of the isolation dome and the outer wall of the separation unit is set as a descending channel. The air inlet pipe is connected to the air inlet chamber. External dust-laden air flows sequentially through the air inlet pipe, air inlet chamber, air guiding channel, ascending channel, descending channel, separation unit, and negative pressure pipe.

2. The dust purification device for corn starch product processing according to claim 1, characterized in that, The separation unit includes a fixed cylinder on the outer side and a rotating cylinder on the inner side. The isolation shroud is connected to the fixed cylinder. The openings of the fixed cylinder and the rotating cylinder both face downwards. The rotating cylinder rotates inside the fixed cylinder. Several openings are provided on the outer wall of the rotating cylinder. The rotating cylinder is connected to the descending channel through several conveying pipes. An exhaust pipe extending into the exhaust chamber is provided at the top of the rotating cylinder.

3. The dust purification device for corn starch product processing according to claim 2, characterized in that, An inner ring is provided on the inner wall of the rotating cylinder, and a baffle is provided on the inner side of the inner ring. The inner ring and the baffle are connected by several fan blades. Several openings are provided on the side wall of the rotating cylinder corresponding to the inner ring, and a baffle is provided on the outer wall of the rotating cylinder to block the several openings.

4. The dust purification device for corn starch product processing according to claim 3, characterized in that, A support ring is provided at the bottom of the rotating drum. The support ring is fixed relative to the fixed drum. The rotating drum rotates on the support ring. One end of the conveying pipe is connected to the support ring, and the other end of the conveying pipe passes through the fixed drum and is connected to the descending channel. Several dispersing ports are opened on the inner wall of the support ring, and the dispersing ports are corresponding to the fan blades.

5. A dust purification device for corn starch product processing according to claim 1, characterized in that, A ring pipe is provided on the outer wall of the second isolation shroud. The ring pipe is located in the water storage chamber. A ring opening is provided on the outer wall of the ring pipe, which faces the inner wall of the outer box. The air inlet pipe is connected to the ring pipe.

6. A dust purification device for corn starch product processing according to claim 5, characterized in that, A second ring pipe is provided on the inner wall of the outer casing corresponding to the first ring pipe, and the bottom of the second ring pipe is provided with a second ring opening for draining water downward and forming an annular water curtain.

7. A dust purification device for corn starch product processing according to claim 6, characterized in that, The outer wall of the second isolation shroud is provided with a collection trough that communicates with the rising channel. The collection trough is connected to the second annular pipe through a number of downwardly inclined drainage pipes.

8. The dust purification device for corn starch product processing according to claim 1, characterized in that, Several guide plates are staggered in the descent channel. The guide plates are inclined downwards, and adjacent guide plates are respectively fixed on the separation unit and the inner wall of the isolation dome.

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