Continuous vibration drying mechanism, dryer and drying method thereof

Abstract

The present invention belongs to the field of drying technology, and particularly relates to a continuous vibration drying mechanism, a dryer and a drying method thereof; among them, a continuous vibration drying mechanism includes: a positioning plate, which is horizontally arranged in a vibrating fluidized bed and is evenly distributed with a plurality of first ventilation openings along the length direction; a support plate, which is slidably arranged on the positioning plate and is evenly distributed with a plurality of second ventilation openings along the length direction; an adjusting component, which is slidably arranged on the support plate and is provided with a plurality of air holes; wherein, the support plate moves horizontally so that the hot air passing through the second ventilation openings flows obliquely upward; the adjusting component moves horizontally to adjust the air flow aperture when the hot air passes through the adjusting component. Through the cooperation of the adjusting component and the support plate, it is possible to achieve hierarchical ventilation control according to the difference in the particle size of the material.

Description

Technical Field

[0001] The present invention belongs to the technical field of drying, and particularly relates to eliminating liquid from solid materials or products, and more particularly to a continuous vibration drying mechanism, a dryer and a drying method thereof. Background Art

[0002] When vibrating fluidized beds are drying materials, a dead bed phenomenon may occur. Currently, the common method for dealing with the dead bed is to increase the air flow rate; however, there is a threshold for the air flow rate, and too fast a speed will affect the formation of the flow state, resulting in the material being unable to flow correctly to the discharge opening.

[0003] In related technologies, currently, the methods for dealing with the dead bed phenomenon in vibrating fluidized beds are single, unable to handle materials of different properties, or for specific materials, no matter how the gas speed is adjusted, there is still a problem of a relatively high probability of dead bed.

[0004] Therefore, how to solve the dead bed phenomenon during material drying is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application. Therefore, the above description is not considered to constitute information on related technologies. Summary of the Invention

[0006] The embodiments of the present disclosure at least provide a continuous vibration drying mechanism, a dryer and a drying method thereof.

[0007] In a first aspect, the embodiments of the present disclosure provide a continuous vibration drying mechanism, including:

[0008] A positioning plate, which is horizontally arranged in the vibrating fluidized bed and is evenly distributed with a number of first ventilation openings along the length direction;

[0009] A support plate, which is slidably arranged on the positioning plate and is evenly distributed with a number of second ventilation openings along the length direction;

[0010] An adjusting component, which is slidably arranged on the support plate and is provided with a number of air holes;

[0011] A control module, which is electrically connected to the adjusting component, and the control module is configured to control the adjusting component to move horizontally relative to the support plate after the support plate moves horizontally so that the hot air flows obliquely upward through the second ventilation openings, so as to adjust the air flow aperture when the hot air passes through the adjusting component, and achieve hierarchical ventilation control.

[0012] In an optional implementation manner, a connecting piece is arranged between the support plate and the positioning plate. The connecting piece is a flexible piece and is provided with a number of air ducts connecting the first ventilation openings and the second ventilation openings.

[0013] In an alternative embodiment, the adjusting assembly includes: two first positioning bars, which are slidably arranged on the support plate and extend along the length direction of the support plate;

[0014] A first adjusting plate, which is arranged between the two first positioning bars, and a plurality of the first adjusting plates are evenly distributed along the length direction of the first positioning bar, and the width of the first adjusting plate is greater than the width of the second ventilation opening;

[0015] A first air hole and a second air hole, a plurality of the first air holes and the second air holes are evenly distributed along the length direction of the first adjusting plate, and the aperture of the first air hole is smaller than the aperture of the second air hole;

[0016] A first adjusting driver, which is arranged on the support plate, and the first positioning bar is fixed to the movable end of the first adjusting driver;

[0017] The control module is electrically connected to the first adjusting driver;

[0018] Wherein, the first adjusting driver drives the first positioning bar to move horizontally, so that the first air hole or the second air hole is located above the second ventilation opening, so as to adjust the air flow aperture when the hot air passes through the first adjusting plate.

[0019] In an alternative embodiment, the adjusting assembly further includes: two second positioning bars, which are slidably arranged on the first positioning bar and extend along the length direction of the first positioning bar;

[0020] A second adjusting plate, which is arranged between the two second positioning bars and has the same width as the first adjusting plate.

[0021] A third air hole and a fourth air hole, a plurality of the third air holes and the fourth air holes are evenly distributed along the length direction of the second adjusting plate, and the aperture of the third air hole is smaller than the aperture of the fourth air hole;

[0022] A second adjusting driver, which is arranged on the support plate, and the second positioning bar is fixed to the movable end of the second adjusting driver;

[0023] The control module is electrically connected to the second adjusting driver;

[0024] Wherein, the second adjusting driver drives the second positioning bar to move horizontally, so that the third air hole or the fourth air hole is located above the second ventilation opening, so as to adjust the air flow aperture when the hot air passes through the second adjusting plate.

[0025] In an alternative embodiment, the sum of the opening areas of the two third air holes is equal to the opening area of the first air hole.

[0026] In an alternative embodiment, the sum of the opening areas of the two fourth air holes is equal to the opening area of the second air hole.

[0027] In an alternative embodiment, according to the difference in the particle size of the material, the first adjustment plate or the second adjustment plate moves horizontally relative to the support plate to accurately align any one of the first air hole, the second air hole, the third air hole or the fourth air hole with the position of the second ventilation opening, so as to achieve hierarchical ventilation control.

[0028] Secondly, the embodiments of the present disclosure further provide a dryer, including:

[0029] A feeding device, which is arranged at one end of the vibrating fluidized bed, and the feeding device is adapted to convey the material to the vibrating fluidized bed;

[0030] A heat supply device, which is arranged on one side of the vibrating fluidized bed, and the heat supply device is adapted to convey hot air into the vibrating fluidized bed; An exhaust gas recovery device, which is arranged on one side of the heat supply device, and an exhaust gas recovery pipe is arranged above the vibrating fluidized bed.

[0031] Thirdly, the embodiments of the present disclosure further provide a drying method for a drying mechanism, adopting the continuous vibration drying mechanism as shown above. The method includes:

[0032] S1: Initial parameter setting: According to the particle density of the material ρ s , gas density ρ g , average particle diameter d p and critical fluidization porosity ε mf , calculate the corrected critical fluidization velocity U mf ;

[0033] S2: Dynamic adjustment of the distribution plate: By driving the first adjustment plate (32) or the second adjustment plate (36) to move horizontally, accurately align the target air hole with the second ventilation opening (20), and adjust the air flow aperture and the opening slope of the distribution plate θ ;

[0034] S3: Gas velocity control: Set the actual gas velocity U g as 1.2 - 1.8 times of the critical fluidization velocity U mf , and output the corresponding actual gas volume flow rate Q g through the fan;

[0035] S4: Real-time monitoring and feedback: Dynamically adjust the opening rate of the distribution plate f and the air flow slope according to the material flow state to suppress the dead bed phenomenon.

[0036] In an alternative embodiment, in step S1, the corrected critical fluidization velocityU mf The calculation formula is:

[0037] ;

[0038] Wherein, μ g is the gas dynamic viscosity, ρ s is the density of the particles, ρ g is the density of the gas, d p is the average particle diameter, g is the acceleration of gravity, ε mf is the critical fluidization porosity.

[0039] In an alternative embodiment, in step S3, the actual gas flow velocity U g satisfies:

[0040] ;

[0041] Wherein, Q g is the actual gas volume flow rate, A is the area of the distributor plate, f is the hole opening ratio.

[0042] In an alternative embodiment, the fluidization stability determination coefficient F s :

[0043] ;

[0044] Wherein, θ is the orifice inclination angle, usually taken as 30° - 60°, N is the number of orifices, N min is the lower limit of the distributor plate holes, and its calculation formula is:

[0045] ;

[0046] Wherein, d is the diameter of a single hole, A is the area of the distributor plate, f is the hole opening ratio.

[0047] The beneficial effects of the present invention are as follows. The present invention provides a continuous vibration drying mechanism, a dryer and a drying method thereof. By adjusting the horizontal sliding of the adjustment component, the adjustment of the air flow aperture and angle is realized, and the hierarchical ventilation control is achieved. Compared with the traditional solution that only relies on adjusting the gas flow rate, through aperture grading and air flow direction optimization, this design can be accurately adapted to different material densities, particle sizes and humidity characteristics, reducing the probability of dead bed occurrence. It solves the core pain points of high dead bed rate and poor adaptability in traditional vibrating fluidized bed drying, and is particularly suitable for the efficient drying of highly viscous and multi-sized materials.

[0048] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures specifically pointed out in the specification and the drawings.

[0049] To make the above objectives, features and advantages of the present invention more obvious and understandable, specific preferred embodiments are hereby given, and in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0051] Figure 1 A perspective view of the continuous vibration drying mechanism provided by an embodiment of the present disclosure;

[0052] Figure 2 A perspective view of the support plate and the positioning plate provided by an embodiment of the present disclosure;

[0053] Figure 3 An exploded perspective view of the adjustment component and the support plate provided by an embodiment of the present disclosure;

[0054] Figure 4 A longitudinal sectional perspective view of the adjustment component and the support plate provided by an embodiment of the present disclosure;

[0055] Figure 5 A schematic diagram of the state where the first air hole is aligned with the second ventilation port provided by an embodiment of the present disclosure;

[0056] Figure 6 A schematic diagram of the state where the second air hole is aligned with the second ventilation port provided by an embodiment of the present disclosure;

[0057] Figure 7Schematic diagram of the state where the third air hole is aligned with the second ventilation opening provided by an embodiment of the present disclosure;

[0058] Figure 8 Schematic diagram of the state where the fourth air hole is aligned with the second ventilation opening provided by an embodiment of the present disclosure;

[0059] Figure 9 Stereogram of a dryer provided by an embodiment of the present disclosure;

[0060] Figure 10 Internal sectional stereogram of a vibrating fluidized bed provided by an embodiment of the present disclosure.

[0061] In the figure:

[0062] 1, positioning plate; 10, first ventilation opening; 2, support plate; 20, second ventilation opening;

[0063] 3, adjusting assembly; 31, first positioning strip; 32, first adjusting plate; 33, first air hole; 34, second air hole;

[0064] 35, second positioning strip; 36, second adjusting plate; 37, third air hole; 38, fourth air hole; 39, first adjusting driver; 40, second adjusting driver;

[0065] 4, connecting piece; 5, feeding device; 6, heating device; 7, waste gas recovery device; 8, vibrating fluidized bed. Detailed implementation manners

[0066] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0067] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component. In addition, in the drawings, for the effective description of the technical content, the thickness of the components may be exaggerated or reduced.

[0068] The terms used herein are for describing specific exemplary configurations only and are not intended to be limiting. As used herein, the singular articles "a", "an", and "the" may also be intended to include the plural forms, unless clearly stated otherwise herein. The terms "comprising", "including", and "having" are inclusive, and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an order of execution. Additional or alternative steps may be employed.

[0069] As used herein, phrases such as "in one embodiment", "according to one embodiment", "in some embodiments", etc. generally refer to the fact that the specific feature, structure, or characteristic after such phrase may be included in at least one embodiment of the present disclosure. Thus, a specific feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example", "exemplary", etc. are used "as an example, instance, or illustration. Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of the terms "example", "exemplary", etc. is intended to present concepts in a specific manner.

[0070] It has been found through research that in the related art, when a vibrated fluidized bed dries materials, a dead bed phenomenon may occur. Currently, the common method for dealing with the dead bed is usually to increase the air flow rate; however, there is a threshold for the air flow rate, and too fast a speed will affect the formation of the flow state, resulting in the materials being unable to flow correctly to the discharge opening.

[0071] In the related art, currently, the methods for dealing with the dead bed phenomenon in vibrated fluidized beds are single, unable to cope with materials of different properties, or for specific materials, there is still a problem of a relatively high probability of dead bed no matter how the gas speed is adjusted.

[0072] The dead bed phenomenon is caused by too high a solid density, which hinders gas flow, resulting in an inability to form a stable fluidization state. The materials accumulate at the bottom, further hindering the flow of hot air, and finally forming a dead bed. There are many reasons for the dead bed phenomenon, such as too fine particles, moisture, thin bed layer, unreasonable air flow distribution, etc. However, currently, for vibrated fluidized beds, the solutions are all to simply adjust the gas speed. It cannot meet the drying requirements under specific environmental conditions or for specific materials.

[0073] Therefore, how to solve the dead bed phenomenon during material drying is a technical problem that urgently needs to be solved in the art.

[0074] When a vibrated fluidized bed dries materials, a dead bed phenomenon may occur. Currently, the common method for dealing with the dead bed is to increase the air flow velocity. However, there is a threshold for the air flow velocity. Excessive velocity will affect the formation of the flow state, resulting in the inability of the materials to flow correctly to the discharge opening.

[0075] In the related art, the current method for dealing with the dead bed phenomenon in a vibrated fluidized bed is single, unable to cope with materials of different properties, or for specific materials, there is still a problem of a large probability of dead bed no matter how the gas velocity is adjusted.

[0076] Therefore, how to solve the dead bed phenomenon during material drying is a technical problem that urgently needs to be solved in this field.

[0077] Regarding the defects of the above solutions and the reasons for their occurrence, they are all the results obtained by the inventor through practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure for the above problems should be the contributions made by the inventor during the disclosure process of this disclosure.

[0078] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0079] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0080] As Figures 1 to 8 shown, at least one embodiment provides a continuous vibration drying mechanism, including:

[0081] A positioning plate 1, which is horizontally arranged in the vibrated fluidized bed 8 and is evenly distributed with a number of first ventilation openings 10 along the length direction; the positioning plate 1 is made of 304 stainless steel and is rectangular. The positioning plate 1 is horizontally fixed in the vibrated fluidized bed 8 and is located above the air supply opening of the heating device 6. A support plate 2, which is slidably arranged on the positioning plate 1 and is evenly distributed with a number of second ventilation openings 20 along the length direction; both the second ventilation openings 20 and the first ventilation openings 10 are rectangular and have the same opening size.

[0082] A driving motor is fixed on the positioning plate 1, and the driving motor is adapted to drive the support plate 2 to move horizontally relative to the positioning plate 1. Attached Figure 1The direction of the arrow in the figure is one direction of the horizontal movement of the support plate 2 relative to the positioning plate 1. The adjusting assembly 3 is slidably arranged on the support plate 2 and is provided with a plurality of air holes; the control module is electrically connected to the adjusting assembly 3, and the control module is configured to control the adjusting assembly 3 to horizontally move when the support plate 2 horizontally moves so that the hot air flows obliquely upward through the second vent 20, and adjust the air flow aperture when the hot air passes through the adjusting assembly 3 to achieve hierarchical ventilation control. By horizontally sliding the adjusting assembly 3, the adjustment of the air flow aperture and the inclination angle is realized, and hierarchical ventilation control is achieved. Compared with the traditional scheme that only relies on adjusting the gas flow rate, this design can be accurately adapted to different material densities, particle sizes and humidity characteristics through aperture grading and air flow direction optimization, reducing the probability of dead bed occurrence. It solves the core pain points of high dead bed rate and poor adaptability in the traditional vibrating fluidized bed 8 drying, and is particularly suitable for the efficient drying of highly viscous and multi-sized materials.

[0083] It should be noted that although straight holes and inclined holes are opened on the positioning plate 1, and the shape and size of the positioning plate 1 are the same, since the channel length of the inclined hole and the form resistance of the inlet and outlet are both greater than those of the straight hole, the pressure drop of the air flow through the positioning plate 1 with the inclined hole is higher than that of the straight hole positioning plate 1. However, when adding materials in the dryer, due to the inclined hole channel causing the air flow to generate a rotational flow, forming radial and tangential velocity fluctuations, the turbulence intensity is significantly enhanced. This rotational flow can effectively break the agglomeration of materials, promote material dispersion, make the gas-solid contact in the dryer more uniform, and improve the fluidization quality. Therefore, although the pressure drop of the air flow through the positioning plate 1 with the inclined hole is slightly higher than that of the straight hole, the effect of generating turbulence makes the fluidization uniformity better, so using the inclined hole is more helpful to eliminate the local dead bed phenomenon. Further, through a limited number of experiments, it can be concluded that when the opening angle θ of the inclined hole ranges from 25° to 45°, it can strengthen the turbulence and avoid too high pressure drop.

[0084] Refer to the appendix Figure 4 , a connecting piece 4 is arranged between the support plate 2 and the positioning plate 1. The connecting piece 4 is a flexible piece and is provided with a plurality of air ducts connecting the first vent 10 and the second vent 20. The connecting piece 4 is suitable for sealingly connecting the support plate 2 and the positioning plate 1. The connecting piece 4 is made of high-temperature silicone rubber, and its temperature resistance range is -60°C to 250°C. It can withstand a temperature of up to 300°C in a short time and is suitable for drying environments containing corrosive gases, such as drying chemical materials such as ammonium sulfate and sodium chloride. When the support plate 2 horizontally moves relative to the positioning plate 1, it is suitable to drive the connecting piece 4 to deform synchronously. After the hot air flows through the first vent 10, the air duct and the second vent 20, its flow direction is inclined.

[0085] Refer to the appendix Figure 3, the adjustment assembly 3 includes: two first positioning bars 31, which are slidably arranged on the support plate 2 and extend along the length direction of the support plate 2; the first positioning bars 31 are adapted to move horizontally relative to the support plate 2. A first adjustment driver 39, which is arranged on the support plate 2, and the first positioning bar 31 is fixed to the movable end of the first adjustment driver 39; the first adjustment driver 39 is adapted to drive the first positioning bar 31 to move horizontally relative to the support plate 2. Preferably, the first adjustment driver 39 is driven by the cooperation of a servo motor and a ball screw, or is driven by a linear motor. The control module is electrically connected to the first adjustment driver 39.

[0086] Continue to refer to the appendix Figure 3 , a first adjustment plate 32, which is arranged between the two first positioning bars 31, and several of the first adjustment plates 32 are evenly distributed along the length direction of the first positioning bar 31. The width of the first adjustment plate 32 is greater than the width of the second ventilation opening 20; a first air hole 33 and a second air hole 34, several of the first air holes 33 and the second air holes 34 are evenly distributed along the length direction of the first adjustment plate 32, and the aperture of the first air hole 33 is smaller than the aperture of the second air hole 34; wherein, the first adjustment driver 39 drives the first positioning bar 31 to move horizontally, so that the first air hole 33 or the second air hole 34 is accurately aligned with the position of the second ventilation opening 20 to adjust the air flow aperture when the hot air passes through the first adjustment plate 32. By horizontally moving the first adjustment plate 32, the air flow aperture of the adjustment assembly 3 can be adjusted.

[0087] Continue to refer to the appendix Figure 3, the adjusting assembly 3 further includes: two second positioning bars 35, which are slidably arranged on the first positioning bar 31 and extend along the length direction of the first positioning bar 31; a second adjusting plate 36, which is arranged between the two second positioning bars 35 and has the same width as the first adjusting plate 32. A second adjusting driver 40, which is arranged on the support plate 2, and the second positioning bar 35 is fixed to the movable end of the second adjusting driver 40; preferably, the second adjusting driver 40 is driven by a combination of a servo motor and a ball screw, or is driven by a linear motor. The control module is electrically connected to the second adjusting driver 40. Third air holes 37 and fourth air holes 38, a plurality of the third air holes 37 and fourth air holes 38 are evenly distributed along the length direction of the second adjusting plate 36, and the aperture of the third air holes 37 is smaller than the aperture of the fourth air holes 38; wherein, the second adjusting driver 40 drives the second positioning bar 35 to move horizontally, so that the third air holes 37 or the fourth air holes 38 are accurately aligned with the position of the second ventilation opening 20, so as to adjust the air flow aperture when the hot air passes through the second adjusting plate 36. Wherein, when the third air holes 37 or the fourth air holes 38 are accurately aligned with the position of the second ventilation opening 20, the first adjusting plate 32 moves horizontally relative to the support plate 2, so that the gap between two adjacent first adjusting plates 32 is directly above the second ventilation opening 20; synchronously, when the first air holes 33 or the second air holes 34 are accurately aligned with the position of the second ventilation opening 20, the second adjusting plate 36 moves horizontally relative to the support plate 2, so that the gap between two adjacent adjusting plates is directly above the second ventilation opening 20.

[0088] Continue to refer to the attached Figure 3 , the sum of the opening areas of the two third air holes 37 is equal to the opening area of the first air hole 33. The sum of the opening areas of the two fourth air holes 38 is equal to the opening area of the second air hole 34. According to the difference in the particle size of the material, the first adjusting plate 32 or the second adjusting plate 36 moves horizontally relative to the support plate 2, and any one of the first air hole 33, the second air hole 34, the third air hole 37 or the fourth air hole 38 is accurately aligned with the position of the second ventilation opening 20 to achieve hierarchical ventilation control.

[0089] In this embodiment, a control module is further included. The first adjusting driver 39, the second adjusting driver 40 and the driving motor are electrically connected to the control module. The control module controls the first adjusting driver 39, the second adjusting driver 40 and the driving motor to work according to the average diameter, humidity, viscosity of the material conveyed into the vibrating fluidized bed 8 and the synchronization of the flow rate and temperature of the hot air conveyed in, so that any one of the first to fourth air holes 38 is accurately aligned with the position of the second ventilation opening 20 to achieve hierarchical ventilation control.

[0090] Refer to the attached Figure 9 and Figure 10, at least one embodiment provides a dryer, comprising: a feeding device 5, which is arranged at one end of a vibrating fluidized bed 8, and the feeding device 5 is adapted to convey materials to the vibrating fluidized bed 8; the feeding device 5 is a screw conveyor, and wet materials are input from the right end of the vibrating fluidized bed 8. A heating device 6, which is arranged on one side of the vibrating fluidized bed 8, and the heating device 6 is adapted to convey hot air into the vibrating fluidized bed 8; the heating device 6 is a gas hot blast stove, with an output temperature of 80 - 150 °C, and the hot air is conveyed into the bottom of the vibrating fluidized bed 8 through an air duct. The above-mentioned continuous vibration drying mechanism is horizontally arranged in the vibrating fluidized bed 8 and is located above the hot air duct of the heating device 6. Temperature sensors and flow rate sensors are also arranged in the vibrating fluidized bed 8, and both are electrically connected to the above-mentioned control module. After receiving the signals emitted by the temperature sensors and flow rate sensors, the control module controls the temperature and flow rate of the hot air conveyed by the gas hot blast stove. An exhaust gas recovery device 7, which is arranged on one side of the heating device 6, and an exhaust gas recovery pipe is arranged above the vibrating fluidized bed 8. The exhaust gas recovery device 7 is a cyclone separator and an activated carbon filter, and a humidity sensor is arranged in the exhaust gas recovery pipe to detect the exhaust humidity in real time.

[0091] At least one embodiment provides a drying method for a drying mechanism, comprising:

[0092] Step S1, initial parameter setting: According to the particle density of the material ρ s , gas density ρ g , average particle diameter d p and critical fluidization porosity ε mf , calculate the corrected critical fluidization velocity U mf ;

[0093] Step S2, dynamic adjustment of the distribution plate: By driving the first adjustment plate 32 or the second adjustment plate 36 to move horizontally, accurately align the target air holes with the second ventilation openings 20, and adjust the air flow aperture and the opening slope of the distribution plate θ ;

[0094] Step S3, gas velocity control: Set the actual gas velocity U g as 1.2 - 1.8 times the critical fluidization velocity U mf , and output the corresponding actual gas volume flow rate Q g through a fan;

[0095] Step S4, real-time monitoring and feedback: Dynamically adjust the opening rate of the distribution plate according to the material flow state fand the air flow gradient to suppress the dead bed phenomenon.

[0096] Furthermore, the critical fluidization velocity is corrected U mf The calculation formula is:

[0097] ;

[0098] The corrected critical fluidization velocity U mf The calculation formula is corrected from the Ergun formula, where μ g is the gas dynamic viscosity, ρ s is the density of the particles, ρ g is the density of the gas, d p is the average particle diameter, g is the acceleration due to gravity, ε mf is the critical fluidization porosity, and in the fluidized bed ε mf generally takes 0.4 - 0.5.

[0099] Furthermore, in step S3, the actual gas velocity U g satisfies:

[0100] ;

[0101] where Q g is the actual gas volume flow rate, A is the distributor plate area, f is the orifice opening ratio.

[0102] Furthermore, the fluidization stability determination coefficient F s :

[0103] ;

[0104] where θ is the orifice inclination angle, usually taking 30° - 60°, N is the number of orifices, N min is the lower limit of the distributor plate orifices, and its calculation formula is:

[0105] ;

[0106] where d is the diameter of a single orifice, A is the distributor plate area, fis the opening ratio.

[0107] In the above formula, U mf is related to the physical properties of the material to be dried. Therefore, after determining the material, the corresponding value can be calculated. U g is related to the model of the fan, the area of the positioning plate 1, and the opening ratio f The lower limit of the holes in the distribution plate N min is related to the area of the positioning plate 1 and the opening ratio f Therefore, the above fluidization stability determination coefficient F s has 3 items directly related to the opening ratio f Furthermore, the opening ratio can be dynamically adjusted through the adjustment component f or the lower limit of the number of holes in the distribution plate can be adjusted separately N min and the inclination angle of the pore channel θ , so as to adjust the result of the overall formula to meet the drying requirements of different types of materials and avoid the occurrence of dead bed phenomenon.

[0108] For a specific implementation case, taking the thermoplastic polyurethane particle dryer as an example, parameter design is carried out:

[0109] Known conditions: Particle diameter d p = 4mm, density ρ s = 1200 kg / m³. Gas flow rate Q g =4500 m³ / h, area of the distribution plate A = 1.8 m². Here, for the convenience of demonstrating theoretical calculations, ε mf is taken as 0.5, g is taken as 10 m / s² , number of holes N = 2300.

[0110] Parameter calculation: Opening ratio, select f = 3%.

[0111] Actual gas velocity U g = (4500 / 3600) ÷ (1.8 × 0.03) = 23.1 m / s .

[0112] Corrected critical fluidization velocity ;

[0113] Aperture, select d = 6 mm, the lower limit of the holes in the distribution plate N min = (1.8 × 0.03) ÷ π(0.003) 2 ≈ 1910.

[0114] The slope adopts θ = 45° inclined holes, increasing the heat transfer coefficient by 15%.

[0115] According to the above calculations, the final fluidization stability determination coefficient ;

[0116] Therefore, after verification, the system can ensure a stable fluidization state when drying thermoplastic polyurethane particles.

[0117] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0118] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 of the present invention. In addition, terms such as "first", "second" and other numerical terms used in this article do not imply order or sequence unless explicitly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section.

[0119] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A continuous vibration drying mechanism, characterized in that, Comprising: A positioning plate (1), which is horizontally arranged in the vibrating fluidized bed and is evenly distributed with a number of first ventilation openings (10) along the length direction; A support plate (2), which is slidably arranged on the positioning plate (1) and is evenly distributed with a number of second ventilation openings (20) along the length direction; An adjusting component (3), which is slidably arranged on the support plate (2) and is provided with a number of air holes; A control module, which is electrically connected to the adjusting component, and the control module is configured to control the adjusting component (3) to horizontally move relative to the support plate (2) after the support plate (2) horizontally moves so that hot air passes through the second ventilation openings (20) and flows obliquely upward, so as to adjust the air flow aperture when the hot air passes through the adjusting component (3), realizing hierarchical ventilation control; The adjusting component (3) includes: two first positioning strips (31), which are slidably arranged on the support plate (2) and extend along the length direction of the support plate (2); A first adjusting plate (32), which is arranged between the two first positioning strips (31), and a number of the first adjusting plates (32) are evenly distributed along the length direction of the first positioning strip (31), and the width of the first adjusting plate (32) is greater than the width of the second ventilation opening (20); A first air hole (33) and a second air hole (34), a number of the first air holes (33) and the second air holes (34) are evenly distributed along the length direction of the first adjusting plate (32), and the aperture of the first air hole (33) is smaller than the aperture of the second air hole (34); A first adjusting driver (39), which is arranged on the support plate (2), and the first positioning strip (31) is fixed to the movable end of the first adjusting driver (39); The control module is electrically connected to the first adjusting driver (39); wherein, the first adjusting driver (39) drives the first positioning strip (31) to horizontally move so that the first air hole (33) or the second air hole (34) is located above the second ventilation opening (20) to adjust the air flow aperture when the hot air passes through the first adjusting plate (32); A connecting piece (4) is arranged between the support plate (2) and the positioning plate (1), the connecting piece (4) is a flexible piece and is provided with a number of air ducts connecting the first ventilation openings (10) and the second ventilation openings (20).

2. The continuous vibration drying mechanism according to claim 1, characterized in that The adjusting component (3) further includes: two second positioning strips (35), which are slidably arranged on the first positioning strip (31) and extend along the length direction of the first positioning strip (31); A second adjusting plate (36), which is arranged between the two second positioning strips (35) and has the same width as the first adjusting plate (32); A third air hole (37) and a fourth air hole (38), a number of the third air holes (37) and the fourth air holes (38) are evenly distributed along the length direction of the second adjusting plate (36), and the aperture of the third air hole (37) is smaller than the aperture of the fourth air hole (38); A second adjusting driver (40), which is arranged on the support plate (2), and the second positioning strip (35) is fixed to the movable end of the second adjusting driver (40); The control module is electrically connected to the second adjusting driver (40); Among them, the second adjustment driver (40) drives the second positioning bar (35) to move horizontally, so that the third air hole (37) or the fourth air hole (38) is located above the second ventilation opening (20), so as to adjust the air flow aperture when the hot air passes through the second adjustment plate (36).

3. The continuous vibration drying mechanism according to claim 2, wherein The sum of the opening areas of the two third air holes (37) is equal to the opening area of the first air hole (33).

4. The continuous vibration drying mechanism according to claim 2, wherein The sum of the opening areas of the two fourth air holes (38) is equal to the opening area of the second air hole (34).

5. The continuous vibration drying mechanism according to claim 2, wherein According to the difference in material particle size, the control module controls the first adjustment plate (32) or the second adjustment plate (36) to move horizontally relative to the support plate (2), and accurately aligns any one of the first air hole (33), the second air hole (34), the third air hole (37) or the fourth air hole (38) with the position of the second ventilation opening (20) to achieve hierarchical ventilation control.

6. A dryer, characterized in that, Using the continuous vibration drying mechanism according to any one of claims 1-5, comprising:[[]] A feeding device (5), which is arranged at one end of the vibrating fluidized bed, and the feeding device (5) is adapted to convey materials to the vibrating fluidized bed; A heating device (6), which is arranged on one side of the vibrating fluidized bed, and the heating device (6) is adapted to convey hot air into the vibrating fluidized bed; An exhaust gas recovery device (7), which is arranged on one side of the heating device (6), and the exhaust gas recovery pipe is arranged above the vibrating fluidized bed.

7. A drying method of a drying mechanism, characterized in that, Using the continuous vibration drying mechanism according to any one of claims 1-5, comprising:[[]] S1: Initial parameter setting: Calculate the corrected critical fluidization velocity according to the material particle density ρ s , gas density ρ g , average particle diameter d p and critical fluidization porosity ε mf , and U mf ; S2: Dynamic adjustment of the distribution plate: By driving the first adjustment plate (32) or the second adjustment plate (36) to move horizontally, the target air holes are accurately aligned with the second ventilation opening (20) to adjust the air flow aperture and the inclination of the distribution plate opening θ ; S3: Gas velocity control: Set the actual gas velocity U g as the critical fluidization velocity U mf which is 1.2 - 1.8 times that of, and output the corresponding actual gas volume flow rate through the fan Q g ; S4: Real-time monitoring and feedback: Dynamically adjust the orifice rate of the distributor plate and the slope of the gas flow according to the material flow state to suppress the dead bed phenomenon. f And the slope of the gas flow to suppress the dead bed phenomenon.

8. The drying method of the drying mechanism according to claim 7, wherein The critical fluidization velocity is corrected in step S1 U mf The calculation formula is as follows: ； wherein, μ g is the gas dynamic viscosity, ρ s is the density of the particles, ρ g is the density of the gas, d p is the average diameter of the particles, g is the acceleration of gravity, ε mf is the critical fluidization porosity.

9. The drying method of the drying mechanism according to claim 8, wherein In step S3, the actual gas flow rate U g satisfies: ； Among them, Q g is the actual gas volume flow rate, A is the area of the distributor plate, f is the hole opening ratio.

10. The drying method of the drying mechanism according to claim 9, wherein Fluidization stability determination coefficient F s : ； Among them, θ is the channel inclination angle, usually taken as 30°-60°, N is the number of opening holes, N min is the lower limit of the distribution plate holes, and its calculation formula is: ； Among them, d is the diameter of a single hole, A is the area of the distribution plate, f is the porosity of the openings.

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