Ventilated atomizing suspension external circulation treatment device

Abstract

The present application relates to industrial sludge pollutant drying equipment technical field, specifically disclose a kind of ventilation atomization suspension external circulation processing equipment, including dryer, further comprising: elbow, inner diameter is made of thin section and thick section and gradually set, and elbow is divided into inclined arc segment and flat arc segment according to inner and outer diameter, inner bag, one end with thin section inner wall keep contact, its inner wall is oppositely arranged with flat arc segment, and form the inner way of airflow passing.The ventilation atomization suspension external circulation processing equipment provided by the present application avoids the wear of the inner ring of the elbow by using the inner bag, and the inner bag can move with the accumulation layer, so that the cross-sectional area of the inner way for airflow passing is maintained in a stable range, avoiding the airflow velocity changing too much, reducing the interference caused by the retention of particles, also reducing the loss of particles on the surface of the accumulation layer due to scraping, and enabling more particles to be stored in the flat arc segment, reducing the opening frequency of the air lock valve, and thereby improving the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial sludge pollutant drying equipment, in particular to a ventilation atomization suspension external circulation treatment equipment. BACKGROUND

[0002] After factory production and processing, a certain amount of sludge-containing industrial wastewater is usually generated. In order to meet the environmental protection requirements of clean discharge, the industrial wastewater needs to be purified first, and the sludge generated by the wastewater precipitation needs to be treated to avoid the leakage of toxic components in the sludge and cause environmental pollution.

[0003] According to the disclosure (announcement) No. CN107285598B, published (announced) on September 29, 2020, an atomization suspension external circulation drying equipment is disclosed, which comprises a dryer composed of multiple bodies. A dispersing device is arranged at the lower end of the dryer, and an atomization nozzle for spraying water-containing sludge particles downward is arranged in the dispersing device. The spraying direction and the hot air blown by the air inlet pipe meet each other, so that the atomized sludge particles are heated and dried, and the particles enter the U-shaped drying elbow along the pipeline and are retained. Then, the larger particles retained are collected and returned to the dryer for secondary drying. The smaller particles discharged from the U-shaped drying elbow are recycled to the rear cyclone separator and cyclone drum for recycling.

[0004] In the prior art including the above-mentioned patent, when the particles are retained by the U-shaped drying elbow, the sensor in the U-shaped drying elbow can only judge according to the pressure, airflow state and particle concentration in the elbow, and the lock air valve is opened to return the particles to the dryer when the particles accumulate to a certain amount (at least a certain amount is needed to reduce the opening frequency of the lock air valve). When processing low-moisture, easily dispersed sludge, the U-shaped drying elbow can be cancelled, but when processing large batches of sludge with high moisture content and not easy to disperse, the U-shaped drying elbow needs to work under load. Therefore, the frequency of particle retention in the U-shaped drying elbow will increase, and the opening frequency of the lock air valve will also increase (normally every ten minutes, now every eight minutes or even lower). On the one hand, the service life of the lock air valve is reduced, and on the other hand, the inner ring of the U-shaped drying elbow is also worn out, which shortens the service life of the U-shaped drying elbow. When the particles accumulate in the U-shaped drying elbow, the channel area in the elbow pipe is reduced due to the accumulation of particles, which increases the gas flow rate at the elbow position and the speed of the particles. The retention capacity of the U-shaped drying elbow for particles is weakened, and the accelerated particles also push and scrape the surface of the accumulated particles, causing the loss of particles on the surface of the accumulated layer, interfering with the opening judgment of the lock air valve, and increasing the workload of the rear circulating separator and cyclone drum, which reduces the drying degree of the discharged particles. SUMMARY

[0005] The purpose of this invention is to provide a ventilation, atomization, suspension, and external circulation treatment device to solve the problems mentioned above.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A ventilation, atomization, suspension, external circulation treatment device includes a dryer and further includes:

[0008] Elbows have an inner diameter consisting of thin and thick sections that gradually change in size. Elbows are also divided into slanted arc sections and flat arc sections based on their inner and outer diameters.

[0009] The inner liner, with one end in contact with the inner wall of the narrow section, has its inner wall positioned opposite the flat arc section, forming an inner channel for airflow, wherein:

[0010] The inner liner is positioned along a predetermined direction to approach the oblique arc segment, making the distance between the inner wall of the inner liner and the flat arc segment adjustable.

[0011] Preferably, the thick section is provided with an extension section that communicates with the flat arc section and is located within the inner channel.

[0012] Preferably, a pipe seat is provided on the outer side of the elbow, and a connecting shaft that can move axially on the pipe seat is fixedly installed on the inner liner.

[0013] Preferably, the tube seat is provided with a threaded sleeve that is threadedly connected to the connecting shaft.

[0014] Preferably, it also includes a sliding sleeve disposed on the outside of the threaded sleeve and having multiple elastic elements disposed between it and the threaded sleeve.

[0015] Preferably, the tube seat is provided with an arc slide that allows the sliding sleeve to move along a predetermined arc path, and the inner liner is driven to move to the extension section under the arc path.

[0016] Preferably, it also includes an outer channel located outside the inner channel, and the inner liner has a square hole that diverts the airflow in the inner channel into the outer channel.

[0017] Preferably, the inner liner port is fixedly equipped with symmetrically arranged triangular ends that abut against the inner wall of the elbow.

[0018] Preferably, the triangular end is provided with an arc plate for use with the flat arc segment for stacking materials.

[0019] Preferably, the triangular end has multiple openings that connect to the flat arc segment.

[0020] In the above technical solution, the ventilation atomization suspension external circulation treatment device provided by the present invention has the following beneficial effects: the shielding ability of the inner liner avoids wear on the inner ring of the elbow, and during the upward movement, the top of the inner wall of the inner liner always maintains the required ventilation distance with the surface of the stockpile, so that the cross-sectional area for airflow in the inner channel is maintained within a stable range, avoiding the situation where the airflow velocity increases when passing through the inner channel, so that the airflow channel in the elbow will not interfere with the retention of particles, and also reduces the problem of particles being scraped and lost from the surface of the stockpile, reducing the impact on the elbow outlet. The increased wear caused by the equipment behind, coupled with the fact that the inner liner can move with the accumulation layer, allows for an increase in the thickness of the accumulation layer while maintaining a stable flow rate in the inner channel. This enables more particles to be stored in the flat arc section. Then, by opening the airlock valve, the storage capacity of the particles is increased while the opening frequency of the airlock valve is reduced. This allows the equipment to achieve the following effects when processing large quantities of sludge particles: ensuring the service life of the airlock valve, reducing damage to the elbow, and feeding back more sludge particles with fewer openings of the airlock valve, thus reducing wear on other equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the ventilation atomization suspension external circulation treatment device provided in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the assembly of the extension inlet pipe, elbow, and extension outlet pipe in the device provided in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of an elbow provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic cross-sectional view of the elbow provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the elbow and inner liner explosion provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the angle of view of the elbow section port provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the perspective of the thick section port of the elbow provided in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram illustrating the positional change of the inner liner within the elbow, provided in an embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of a connecting shaft provided in an embodiment of the present invention;

[0031] Figure 10 An exploded view of the connecting shaft, threaded sleeve, and sliding sleeve provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Dryer; 11. Extended inlet pipe; 12. Extended outlet pipe; 13. Circulating separator; 14. Cyclone; 2. Elbow; 21. Thin section; 22. Coarse section; 23. Raised section; 24. Flat arc section; 25. Sloping arc section; 26. Extension section; 3. First ash collection bin; 31. Second ash collection bin; 4. Pipe seat; 41. Sliding hole; 42. Side plate; 43. Arc slide; 5. Connecting shaft; 51. Clamping piece; 52. Threaded section; 53. Threaded sleeve; 54. Sliding block; 55. Sliding sleeve; 56. Ring; 57. Slide groove; 6. Inner liner; 61. Round hole; 62. Square hole; 63. Triangular end; 64. Opening; 65. Arc plate; 7. Inner channel; 71. Outer channel. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] like Figures 1-10 As shown, a ventilated atomizing suspension external circulation treatment device includes a dryer 1, and further includes:

[0036] Elbow 2 has an inner diameter composed of a thin section 21 and a thick section 22, which are gradually changed. Elbow 2 is divided into a slanted arc section 25 and a flat arc section 24 according to its inner and outer diameters.

[0037] The inner liner 6, one end of which is in contact with the inner wall of the thin section 21, has its inner wall opposite to the flat arc section 24, forming an inner channel 7 for airflow, wherein:

[0038] The inner liner 6 moves towards the oblique arc segment 25 in a predetermined direction, so that the distance between the inner wall of the inner liner 6 and the flat arc segment 24 is adjustable.

[0039] Specifically, the dryer 1 is also connected to an extended inlet pipe 11 installed at the air inlet of the elbow 2, and the air outlet of the elbow 2 is connected to an extended outlet pipe 12. The air outlet of the extended outlet pipe 12 is connected to a circulation separator 13 and a cyclone 14 located at the air outlet of the circulation separator 13. All components are installed using bolts and nuts for easy removal. The dryer 1, extended inlet pipe 11, extended outlet pipe 12, circulation separator 13 and cyclone 14 are all components in the prior art and will not be described in detail here.

[0040] Furthermore, such as Figure 4 As shown, the inner liner 6 will increase its contact area at the end during the upward movement, so that the left port of the inner channel 7 is always used for airflow, thereby enabling the inner liner 6 to function as a shield for the inner ring of the elbow 2.

[0041] Furthermore, the inner liner 6 is made of an elastic alloy metal, which allows the two ends of the inner liner 6 to recover their deformation and maintain their fit with the inner wall of the elbow 2 during the upward movement (the two lower ends of the inner liner 6 are located below the axis of the elbow 2 by default and are in a deformed and closed state), ensuring the stability of the inner channel 7 as a passage for airflow. The sum of the horizontal area and the upward movement area when the two ends of the inner liner 6 expand can be kept the same as the channel area of ​​the inner channel 7 when there are no particles, so that the cross-section of the airflow in the inner channel 7 is kept within the required range.

[0042] Furthermore, during the upward movement, the lower end of the inner liner 6 remains parallel to the tangent of the flat arc segment 24, while the apex of the inner liner 6 forms a triangular chamber with the oblique arc segment 25, which facilitates the adjustment of the cross-section of the inner channel 7.

[0043] When the particulate-containing airflow enters the inner channel 7 from the port of the narrow section 21, the inner liner 6 effectively prevents wear on the inner ring of the elbow 2. During the material accumulation in the concave section 24, the inner liner 6 is moved upward. Throughout this process, the top of the inner wall of the inner liner 6 maintains the required ventilation distance from the surface of the material layer, keeping the cross-sectional area for airflow in the inner channel 7 within a stable range (allowable fluctuation range of ±3cm² (the value for area change, positive and negative represent excessively large or small constant change area)). This prevents the airflow velocity from increasing when passing through the inner channel 7, ensuring that the airflow channel in the elbow 2 does not interfere with the retention of particles, and also reduces the occurrence of particulate matter on the surface of the accumulated layer. The problem of particles being scraped away is reduced, thus minimizing wear on equipment behind the air outlet of elbow 2. Furthermore, because the inner liner 6 can move with the accumulated layer, the layer thickness can be increased while maintaining a stable flow rate in the inner channel 7. This allows for the storage of more retained particles in the flat arc section 24. Opening the airlock valve further increases the particle storage capacity and reduces its opening frequency. Therefore, when processing large quantities of sludge particles, the equipment achieves the following benefits: ensuring the lifespan of the airlock valve, reducing damage to elbow 2, and allowing for the return of more sludge particles with fewer openings than previously required, thus reducing wear on other equipment.

[0044] As a further embodiment of the present invention, the thick section 22 is provided with an extension section 26 that communicates with the flat arc section 24 and is located within the inner channel 7.

[0045] Specifically, the inner wall of the outer ring of the elbow 2 is integrally formed with a raised section 23 located between the flat arc section 24 and the extension section 26. The purpose is to use the raised section 23 to divide the particles accumulated on the outer ring of the elbow 2, so that the maximum height of the particle layer accumulated on the raised section 23 and the flat arc section 24 is flush.

[0046] Furthermore, the outer ring of the elbow 2 is welded with a first ash collection bin 3 and a second ash collection bin 31, which are connected to it and used for collecting and discharging particles downwards. The first ash collection bin 3 is connected to the flat arc section 24, and the second ash collection bin 31 is connected to the extension section 26. When the particles reach the raised section 23, the sensor inside the elbow 2 receives a visual or pressure signal when the material accumulates to the raised section 23, and converts the signal into an electrical signal in the sensor, which is then transmitted through a wire until... An electrical signal enters the airlock valve, which then transmits the signal to the power drive component inside the valve body (which can be the deflection power of a motor, the pushing force of an electric push rod, or any existing structure or component known to those skilled in the art). This causes the power drive component to open the valve plate, exposing the internal channel of the airlock valve to convey particles from the two ash collection bins downwards. (The sensor and the two ash collection bins are existing technologies and will not be described in detail here.) This triggers the airlock valve to open, releasing the particles from the first ash collection bin 3 and the second ash collection bin 31.

[0047] When the sludge particles processed by the elbow 2 exceed the above-mentioned batch, the extension section 26 can be used to accommodate more particles. After the particles accumulate to the second ash collection bin 31 covering the extension section 26, the first ash collection bin 3 and the flat arc section 24 are opened at the same time to discharge more particles. In this way, when the elbow 2 processes more sludge particles, the opening frequency of the airlock valve can be further reduced.

[0048] As another embodiment of the present invention, a pipe seat 4 is provided on the outer side of the elbow 2, and a connecting shaft 5 that can move axially on the pipe seat 4 is fixedly installed on the inner liner 6.

[0049] Specifically, the pipe seat 4 is welded to the outer wall of the inner bend of the elbow 2, and the pipe seat 4 has a sliding hole 41 (with a frustum-shaped cross-section to accommodate the misalignment of the connecting shaft 5) that connects to the elbow 2. Figure 9 As shown, a clamp 51 is provided at the lower end of the connecting shaft 5. The clamp 51 consists of an integrally formed annular plate and a threaded annular plate. The lower end of the connecting shaft 5 is inserted into the round hole 61 opened on the side wall of the inner liner 6. Then, the annular plate is screwed on the inner wall of the inner liner 6 to clamp the inner liner 6, thereby satisfying the requirement that the inner liner 6 can move stably along the direction of the connecting shaft 5.

[0050] Furthermore, the outer wall of the inner ring of the elbow 2 is provided with multiple screw grooves and covered by a transparent cover made of quartz glass. The edge of the transparent cover port is composed of a metal ring and a sealing rubber ring. Bolts are used to fix the transparent cover port to the multiple screw grooves, so that the transparent cover can make the internal parts visible while also sealing the sliding hole 41.

[0051] The inner liner 6 is securely installed and connected by the connecting shaft 5, which also provides movement guidance for the inner liner 6, allowing it to move along a predetermined upward path and ensuring the parallel movement of the inner liner 6 and the flat arc segment 24.

[0052] As a further embodiment of the present invention, the tube seat 4 is provided with a threaded sleeve 53 that is threadedly connected to the connecting shaft 5.

[0053] Specifically, the connecting shaft 5 has an integrally formed screw segment 52 on its side wall, and the screw segment 52 and the threaded sleeve 53 are assembled. The connection method can use a conventional thread or lead screw connection transmission, or an existing mechanism or component known to those skilled in the art that can realize the driven movement of the connecting shaft 5.

[0054] By positioning the inner liner 6 within the elbow 2, the connecting shaft 5 is prevented from rotating, allowing the connecting shaft 5 to move upward when the threaded sleeve 53 is rotated. This adjusts the height of the inner liner 6 within the elbow 2, enabling the inner liner 6 to pre-adjust the ventilation area of ​​the inner channel 7 (in the default state, the inner liner 6 sets the inner channel 7 to have the minimum ventilation area, i.e., the maximum airflow rate), thus allowing the elbow 2 to be adapted in advance to the required sludge particle throughput.

[0055] As another embodiment of the present invention, it further includes a sliding sleeve 55 disposed on the outside of the threaded sleeve 53 and having a plurality of elastic elements disposed between it and the threaded sleeve 53.

[0056] Specifically, the outer side of the sliding sleeve 55 is designed as a polygonal structure, which makes it easy for workers to use tools to drive its rotation. The inner side wall of the sliding sleeve 55 matches the cylindrical threaded sleeve 53. A circumferentially arranged slider 54 is fixedly installed on the outer side wall of the threaded sleeve 53, while the inner wall of the sliding sleeve 55 is provided with a groove 57 for the slider 54 to slide (one end of which has an opening (the opening faces downward toward the inner liner 6), so that the slider 54 can slide into the opening and mate with the threaded sleeve 53 and the sliding sleeve 55).

[0057] Furthermore, a spring is fixedly installed between the slider 54 and the inner wall of the other end of the groove 57, with one end of the spring welded to the slider 54 and the other end abutting against the inner wall of the groove 57. The spring's elastic coefficient is greater than that of the two ends below the inner liner 6 (the thrust generated by the accumulation of particles is greater than the spring's elastic coefficient). Therefore, the spring keeps the two ends below the inner liner 6 deformed in the default state.

[0058] By using slider 54 to keep threaded sleeve 53 and sliding sleeve 55 as one in the circumferential direction, it is convenient for the threaded drive connecting shaft 5 to move upward when the sliding sleeve 55 is rotated. In the axial direction, the connecting shaft 5 is kept as one with threaded sleeve 53, so that when the connecting shaft 5 moves upward with the inner liner 6 driven by the accumulation layer, slider 54 actively compresses the spring deformation, so that the inner liner 6 has two functions of active upward movement and passive upward movement, thereby meeting the requirement of high-efficiency particle conveying when the inner liner 6 is in the elbow 2.

[0059] As a further embodiment of the present invention, the tube seat 4 is provided with an arc slide 43 that causes the sliding sleeve 55 to move along a predetermined arc path, and the inner liner 6 is driven to move to the extension section 26 under the arc movement path.

[0060] Specifically, symmetrically arranged side plates 42 are fixedly installed on the tube base 4, and arc slides 43 are opened on the end face of the side plates 42, with the two arc slides 43 arranged opposite to each other. A ring 56 that slides in the arc slide 43 is fixedly installed at the end of the sleeve 55, and a rubber ring that keeps in contact with the inner wall of the arc slide 43 is fixedly installed on the end face of the ring 56, so as to use friction to keep the sleeve 55 fixed and slide stably.

[0061] Furthermore, the arc-shaped slide 43 allows the inner liner 6 to remain parallel to the flat arc segment 24 when the connecting shaft 5 is adjusted to an inclined state.

[0062] By moving the sliding sleeve 55 along an arc path on the side plate 42 and tilting the downward extension section 26 of the inner liner 6, the flat arc section 24 and the extension section 26 can be stacked together to drive the inner liner 6 to move obliquely upward. This allows the inner liner 6 to accommodate a larger batch of sludge particles. In this state, the two ends of the inner liner 6 open at a larger angle, providing a larger area for airflow in the inner channel 7. This results in a more significant reduction in particle velocity, thereby improving the particle retention capacity and meeting the requirements for particle return under special load conditions.

[0063] As a further embodiment of the present invention, it also includes an outer channel 71 disposed outside the inner channel 7, and a square hole 62 is provided on the inner liner 6 to divert the airflow in the inner channel 7 into the outer channel 71.

[0064] Specifically, a small portion of the floating particles in the outer channel 71 are sent into the transparent cover through the sliding hole 41 so that the staff can know the state of the particles in the elbow 2 through the transparent cover. When the particles are floating in the transparent cover, some particles will also enter the rubber ring on the ring 56, and the friction between the rubber ring and the arc slide 43 will be forced to increase, thereby improving the stability of the position of the sliding sleeve 55.

[0065] Furthermore, the outer channel 71 is a triangular chamber outside the inner liner 6, and the square hole 62 is located in the coarse section 22, which allows the outer channel 71 to have a larger space for particle retention. Therefore, the particles diverted from the square hole 62 have sufficient settling space and deceleration, which allows the particles entering the outer channel 71 to be separated into larger particles. The larger particles sink and fall into the square hole 62 until they fall into the accumulation layer. The larger particles that have been diverted and blown by the square hole 62 are pushed back upward into the outer channel 71 and the secondary separation step is repeated until the larger particles fall into the accumulation layer, making the particle separation more obvious.

[0066] The airflow in the inner channel 7 is split at the square hole 62, and the airflow enters the outer channel 71 at an angle. When the airflow is flowing in the inner channel 7, larger particles will sink to the bottom first and a slight separation will occur. At the same time, because the splitting will reduce the flow velocity in the inner channel 7, a significant particle separation will occur at the square hole 62. That is, larger particles will sink and accumulate due to the reduced velocity, while smaller particles will be discharged along the inner wall of the arc top of the inner liner 6 and enter the outer channel 71 for separation. This will cause a significant separation between larger and smaller particles, so that smaller particles can be discharged first from the coarse section 22 in the same time period. This will make it easier for the subsequent circulating separator 13 and cyclone 14 to distinguish particles of different sizes, reduce equipment processing time, and reduce wear and tear on the equipment after the elbow 2.

[0067] As another embodiment of the present invention, the inner liner 6 has a symmetrically arranged triangular end 63 that abuts against the inner wall of the elbow 2.

[0068] Specifically, such as Figure 7 As shown, the triangular end 63 is an acute-angled elastic metal plate formed by bending the lower end of the inner liner 6.

[0069] By embedding the triangular end 63 downwards into the accumulation layer, the inner liner 6 moves downwards when the accumulated particles are discharged from the elbow 2. During this process, the triangular end 63 uses its pointed cone to scrape the inner wall of the elbow 2, thereby scraping the accumulation position of the particles and further reducing the adhesion of moisture-containing particles to the inner wall of the elbow 2. The secondary benefit is to reduce the amount of particles discharged due to adhesion and clumping of the accumulation layer. The primary benefit is to prevent the elbow 2 from becoming blocked due to long-term accumulation and thickening of particles.

[0070] As another embodiment of the present invention, the triangular end 63 is provided with an arc plate 65 for cooperating with the material stacking of the flat arc segment 24.

[0071] Specifically, the arc plate 65 is integrally formed at the bend position of the triangular end 63, and the arc-shaped bulge of the arc plate 65 faces downward so that the bulging arc surface contacts the surface of the deposited layer, thereby realizing the transmission of driving force. The arc plate 65 has a high position and a low position. The high position is connected to the triangular end 63 and is always above the surface of the deposited layer. The horizontal distance between the two low positions is greater than the sum of the horizontal distances from the two low positions to the inner wall of the bend 2. Therefore, the inner channel 7 can provide the particles with sufficient particle accumulation area.

[0072] The gradual thickening of the accumulated layer surface provides an upward thrust to the arc plate 65, and the arc plate 65, located at the lower end of the entire inner liner 6, also has sufficient contact surface to be pushed, ensuring the ability of the inner liner 6 to move upward adaptively as particles accumulate. The strip-shaped arc plate 65 can also reduce the interference to the airflow conveying particles in the inner channel 7. At the same time, the arc plate 65 can also shield the two sides of the lower accumulated layer, reducing the loss of particles due to their proximity to the inner wall of the bend 2.

[0073] As another embodiment of the present invention, the triangular end 63 is provided with a plurality of openings 64 that are connected to the flat arc segment 24.

[0074] Specifically, such as Figure 8 As shown by the arc-shaped arrow, and the dotted line in the figure represents the height of the material accumulation layer, the cross-sectional area of ​​the outer channel 71 decreases as the particles accumulate, which can change the airflow velocity in the outer channel 71. The opening 64 is located at the different heights of the two side walls of the triangular end 63, while the side wall of the opening 64 that is biased towards the raised position of the arc plate 65 is high, while the other side wall of the opening 64 is inside the accumulation layer. Therefore, the incoming airflow will preferentially cut in obliquely downward along the raised position of the arc plate 65, causing the particles at the opening 64 to be agitated. The agitated particles have little impact on the main area where particles are retained between the two arc plates 65 (because the arc plate 65 is located above the surface of the accumulation layer, forming a ridge-like barrier). Therefore, the agitated particles are mainly close to the inner wall of the elbow 2.

[0075] By embedding the particles in the packing layer through the opening 64, the airflow flowing through the upward opening of the triangular end 63 enters along one side of the opening 64 and agitates the particles at the opening 64. This sacrifices the floating of a small number of particles (which will be subject to settling at the diversion point after floating, thus having little impact on the particles retained in the inner channel 7), in exchange for the particles below the opening 64 transmitting agitation to the inner wall of the elbow 2. This reduces the problem of particle adhesion near the side wall of the elbow 2 during the material stacking process (when the triangular end 63 is not scraped), thereby ensuring the fluid state after particle accumulation and facilitating the return of collected particles. Furthermore, due to the reduced area of ​​the outer channel 71, the airflow velocity discharged from the outer channel 71 to the port of the coarse section 22 will increase, thereby widening the gap between smaller and larger particles, making the separation of smaller particles more obvious and facilitating subsequent processing.

[0076] Working principle: The particulate-containing airflow enters the inner channel 7 from the port of the narrow section 21, causing the particles to accumulate in the depression of the flat arc section 24, forming a gradually thickening accumulation layer. This provides an upward thrust to the arc plate 65, causing the inner liner 6 to move upward. During this process, the top of the inner wall of the inner liner 6 always maintains the required ventilation distance from the surface of the material layer, keeping the cross-sectional area of ​​the airflow in the inner channel 7 within a stable range. This prevents the airflow velocity from increasing when passing through the inner channel 7, ensuring that the airflow channel in the elbow 2 does not interfere with the retention of particles. It also reduces the problem of particles being scraped and lost from the surface of the accumulation layer, reducing the increased wear on the equipment behind the air outlet of the elbow 2. Since the inner liner 6 can move with the accumulation layer, under the condition that the flow velocity in the inner channel 7 remains stable, the thickness of the accumulation layer can be increased, allowing the flat arc section 24 to store more retained particles. Then, the airlock valve is opened, increasing the storage capacity of particles while reducing the opening frequency of the airlock valve to ensure its service life.

[0077] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A ventilated atomizing suspension external circulation treatment device, comprising a dryer (1), characterized in that, Also includes: The elbow (2) has an inner diameter consisting of a thin section (21) and a thick section (22) in a gradually changing manner. The elbow (2) is divided into a slanted arc section (25) and a flat arc section (24) according to the inner and outer diameters. The inner liner (6) has one end in contact with the inner wall of the thin segment (21), and its inner wall is positioned opposite to the flat arc segment (24), forming an inner channel (7) through which airflow passes, wherein: The inner liner (6) approaches the oblique arc segment (25) in a predetermined direction, so that the distance between the inner wall of the inner liner (6) and the flat arc segment (24) is adjustable; It also includes an outer channel (71) located outside the inner channel (7), and the inner liner (6) has a square hole (62) for diverting the airflow in the inner channel (7) into the outer channel (71). The inner liner (6) has a symmetrically arranged triangular end (63) that abuts against the inner wall of the elbow (2). The triangular end (63) is provided with an arc plate (65) for use with the flat arc section (24) for material stacking. The triangular end (63) has multiple openings (64) that connect to the flat arc segment (24).

2. The ventilation atomization suspension external circulation treatment device according to claim 1, characterized in that, The thick section (22) is provided with an extension section (26) that is connected to the flat arc section (24) and located in the inner channel (7).

3. The ventilation atomization suspension external circulation treatment device according to claim 2, characterized in that, A pipe seat (4) is provided on the outside of the elbow (2), and a connecting shaft (5) that can move axially on the pipe seat (4) is fixedly installed on the inner liner (6).

4. The ventilation atomization suspension external circulation treatment device according to claim 3, characterized in that, The tube seat (4) is provided with a threaded sleeve (53) that is threadedly connected to the connecting shaft (5).

5. The ventilation atomizing suspension external circulation treatment device according to claim 4, characterized in that, It also includes a sliding sleeve (55) disposed on the outside of the threaded sleeve (53) and having multiple elastic elements disposed between it and the threaded sleeve (53).

6. The ventilation atomizing suspension external circulation treatment device according to claim 5, characterized in that, The tube seat (4) is provided with an arc slide (43) that allows the sliding sleeve (55) to move along a predetermined arc path, and the inner liner (6) is driven to move to the extension section (26) under the arc movement path.

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