Drying granulator of fluidized bed

Abstract

The invention relates to the technical field of drying devices, in particular to a drying granulator of a fluidized bed. A drying granulator of a fluidized bed comprises a drying cylinder, a filtering mechanism and a crushing mechanism. The drying cylinder is internally divided into a filtering cavity and a boiling cavity. The filtering mechanism comprises an adjusting assembly, a first driving assembly, a second driving assembly and a filtering assembly. The adjusting assembly comprises a rotating plate. The first driving assembly rotates the rotating plate according to the blockage degree of the filter bag in each filter assembly so as to change the volume of each adjusting cavity. The blocking degree of the filter bag in each filter assembly is in positive correlation with the size of the corresponding adjusting cavity, and then the influence on boiling of the boiling cavity is reduced. And the crushing mechanism is used for crushing materials falling from the filter bag. The invention provides a drying granulator of a boiling bed, aiming at solving the problems that the boiling uniformity of a boiling chamber is easily influenced when an existing boiling dryer is used for cleaning ash, and hardened materials on a filter bag directly fall into the boiling chamber, so that the granulation granularity of the materials is influenced.

Description

Technical Field

[0001] The invention relates to the technical field of drying devices, in particular to a fluidized bed drying granulator. Background Art

[0002] Fluidizing dryers improve flowability, reduce dust generation, and enhance solubility through powder granulation. They also combine mixing, granulation, and drying within a single machine, achieving one-step granulation. Antistatic filter cloth ensures safe operation. Pressure relief vents are provided to minimize operator injury in the event of an explosion. Fluidizing dryers heat air through a heat exchanger, generating hot air that is distributed through a valve plate into the main unit. Wet material enters the dryer from the feeder, where it boils under the pressure of the air and comes into contact with the hot air, effectively drying the material in a short period of time.

[0003] Core Principle: Clean, heated air (or inert gas) is forced through the material bed from the bottom of the equipment through a distribution plate. When the airflow velocity reaches a certain value, the material particles are lifted and suspended in the airflow, exhibiting a state similar to boiling liquid. This ensures full and uniform contact between the material particles and the hot air. Simultaneously with the fluidization of the material, a liquid binder (such as a solution, slurry, or melt) is sprayed into the fluidized bed through a spray gun (atomizer). The atomized droplets collide with the suspended powder particles, wetting them, spreading, coalescing, and solidifying.

[0004] For example, patent publication CN114247223B discloses a fluidized bed dryer that continuously removes powder from the filter bag using a gas jet, thereby shortening the time fine powder accumulates and allowing for more thorough cleaning and reducing airflow resistance, thereby improving air filtration efficiency. However, during cleaning, the material on the filter bag can easily form a compaction, causing the removed material to fall directly into the fluidized bed, affecting the particle size. Furthermore, uneven clogging of the filter bag can cause uneven gas flow from the fluidized bed to the filter bag, further disturbing the gas above the material in the fluidized bed, causing internal pressure fluctuations and affecting fluidization uniformity. Summary of the Invention

[0005] The invention provides a fluidized bed drying and granulating machine to solve the problems that the boiling uniformity of the fluidized bed drying machine is easily affected during dust cleaning, and the agglomerated materials on the filter bag directly fall into the fluidized bed drying machine, thereby affecting the granularity of the materials.

[0006] The present invention employs the following technical solution: The fluidized bed dryer and granulator comprises a drying drum, a filtering mechanism, and a crushing mechanism. The drying drum is vertically arranged, and its interior is divided from top to bottom into a filtering chamber and a boiling chamber. The filtering mechanism comprises a connecting frame, an adjustment assembly, a first drive assembly, a second drive assembly, and two horizontally arranged filtering assemblies. The connecting frame is located within the filtering chamber. Each filtering assembly includes multiple filter bags located above the connecting frame.

[0007] The adjustment assembly includes a ventilation plate and a rotating plate. The ventilation plate is positioned within the filter chamber and below the connecting frame. Two ventilation channels are defined on the ventilation plate, corresponding to the two filter assemblies. The rotating plate is rotatably mounted on the ventilation plate, dividing the space between the ventilation plate and the connecting frame into two adjustment chambers, each connected to a ventilation channel. The rotating plate is provided with a first air hole. The drying cylinder has openings corresponding to the two filter assemblies.

[0008] The filtration mechanism has a working phase and a cleaning phase. During the working phase, the first drive assembly rotates the rotating plate to change the volume of each regulating chamber based on the degree of blockage of the filter bags in each filter assembly. The degree of blockage of the filter bags in each filter assembly is positively correlated with the volume of the corresponding regulating chamber to minimize the impact on boiling in the boiling chamber. During the cleaning phase, the second drive assembly causes the filter bags in one filter assembly to vibrate and pushes the rotating plate to block the corresponding ventilation channel of the other filter assembly. A crushing mechanism, located below the filter bags, crushes material that falls from the filter bags and directs the crushed material into the boiling chamber.

[0009] Furthermore, the two filter assemblies are a first filter bag assembly and a second filter bag assembly. The two ventilation channels are a first channel corresponding to the first filter bag assembly and a second channel corresponding to the second filter bag assembly. The two adjustment chambers are a first chamber communicating with the first channel and a second chamber communicating with the second channel.

[0010] A fluidized bed drying granulator further includes a suction mechanism comprising an air pump. The two openings are a first air outlet and a second air outlet. The first air outlet corresponds to a first filter bag assembly. The second air outlet corresponds to a second filter bag assembly.

[0011] Valves are provided at the first air outlet and the second air outlet. An air pump is fixedly arranged outside the drying cylinder, and two air pipes are provided on the air pump, and the two air pipes are respectively connected to the first air outlet and the second air outlet.

[0012] Furthermore, the two filter assemblies are sequentially arranged in a first direction. The first drive assembly includes a first drive unit, which includes a first motor. The first motor is fixedly mounted on the ventilation plate, and the output shaft of the first motor is arranged along a second direction. The second direction and the first direction are both horizontal, and the second direction is perpendicular to the first direction. The rotating plate has two sides parallel to the second direction, namely a first side and a second side. The first side of the rotating plate is rotatably connected to the ventilation plate. The output shaft of the first motor is fixedly connected to the first side of the rotating plate.

[0013] Furthermore, pressure sensors are provided at both the first and second air outlets, and a controller is provided on the first motor. The controller controls the first motor to drive the rotating plate to rotate according to the exhaust pressures detected by the pressure sensors at the first and second air outlets.

[0014] The lower the exhaust pressure at the first air outlet, the more serious the clogging of the filter bag in the first filter bag assembly. When the exhaust pressure at the first air outlet is lower than that at the second air outlet, the rotating plate rotates so that the volume of the first chamber is larger than that of the second chamber. When the exhaust pressure at the first air outlet is higher than that at the second air outlet, the rotating plate rotates so that the volume of the first chamber is smaller than that of the second chamber.

[0015] Furthermore, a first stopper and a second stopper are fixedly disposed on the second side of the rotating plate. Along the first direction, a first limiting groove and a first through-groove are defined on the side of the first channel away from the second channel. A second limiting groove and a second through-groove are defined on the side of the second channel away from the first channel. When the first stopper and the first limiting groove abut against each other, the second stopper is positioned within the first through-groove. When the second stopper and the second limiting groove abut against each other, the first stopper is positioned within the second through-groove. The first and second limiting grooves are used to limit the position of the rotating plate.

[0016] Furthermore, the second drive assembly includes two transmission units, and the two transmission units correspond to the two filter assemblies one by one. Each transmission unit includes a pressure plate, a push rod and a hydraulic cylinder. The push rod is vertically arranged, and the push rod is slidably arranged on the connecting frame. The lower side of the push rod is used to abut against the rotating plate. The pressure plate is horizontally arranged, and the upper end of the pressure plate and the push rod are fixedly connected. The filter bags are vertically arranged, and each pressure plate is fixedly connected to the upper ends of multiple filter bags in the corresponding filter assembly. The hydraulic cylinder is fixedly arranged in the drying cylinder, and the extended end of the hydraulic cylinder is vertically arranged, and the extended end of each hydraulic cylinder is fixedly connected to a pressure plate.

[0017] Furthermore, each transmission unit includes a connecting rod and a magnet. The connecting rod is vertically arranged, and the connecting rod and the push rod are sequentially arranged along the first direction. The connecting rod is located on a side away from the rotating plate relative to the push rod. The upper end of the connecting rod is fixedly connected to the lower side of the pressure plate. The magnet is fixedly mounted on the lower end of the connecting rod. The length of the connecting rod is greater than that of the push rod.

[0018] The magnet corresponding to the first filter bag assembly and the second baffle magnetically repel each other, thereby pushing the rotating plate to deflect toward the second channel. The magnet corresponding to the second filter bag assembly and the first baffle magnetically repel each other, thereby pushing the rotating plate to deflect toward the first channel.

[0019] Furthermore, a curved plate is fixedly mounted on the lower side of the connecting frame, and the curved plate is arranged along the second direction. The concave surface of the curved plate faces the rotating plate and abuts against the second side of the rotating plate. A plurality of second air holes are formed on the curved plate.

[0020] Furthermore, the crushing mechanism includes a fixed frame, a crushing disc, an eccentric shaft, a second motor, and multiple rubber columns. The fixed frame is fixedly mounted within the drying drum. The eccentric shaft and the drying drum are coaxially arranged. The lower end of the eccentric shaft is rotatably connected to the fixed frame. The crushing disc is located above the fixed frame and fixedly connected to the upper end of the eccentric shaft. The crushing disc and the eccentric shaft are eccentrically positioned. The crushing disc is provided with multiple crushing holes.

[0021] Multiple rubber columns are distributed sequentially along the circumference of the crushing disc. Each rubber column has its upper end connected to the crushing disc and its lower end connected to a mounting bracket. A second motor is fixedly mounted on the mounting bracket, with its output shaft vertically positioned and fixedly connected to the eccentric shaft.

[0022] Furthermore, a fluidized bed drying and granulating machine also includes a fluidizing mechanism comprising a heater, a fan, and a spray gun. The heater, fan, and spray gun are disposed within a fluidizing chamber. The heater heats the material, and the fan provides fluid power. The spray gun is used to spray an adhesive onto the material within the fluidizing chamber. A feed inlet is defined within the drying drum and communicates with the fluidizing chamber.

[0023] The beneficial effect of the present invention is that, in a fluidized bed drying and granulating machine of the present invention, by providing a filtering mechanism and a crushing mechanism, when the filter bag in one filter assembly is clogged more than the filter bag in another filter assembly, the first drive assembly rotates the rotating plate, thereby causing the volume of the regulating chamber corresponding to the filter assembly with the more severe clogged condition to be larger than the volume of the other regulating chamber.

[0024] Part of the gas in the regulating chamber with increased volume is filtered upward by the filter bag in the corresponding filter assembly, part of the gas enters the regulating chamber with reduced volume from the first air hole of the rotating plate, and the other part of the gas directly enters the filter assembly with less blockage, so that the air intake volume of the two regulating chambers is almost the same, and the internal pressure of the boiling chamber is kept consistent, so as to reduce the impact on the boiling of the boiling chamber.

[0025] During the cleaning phase of the filter mechanism, when the filter bag of one filter assembly is cleaned, the opening corresponding to that filter assembly is first sealed. The second drive assembly pushes the rotating plate to seal the ventilation channel corresponding to the other filter assembly, thereby reducing the amount of airflow directly from the boiling chamber into the regulating chamber corresponding to the uncleaned filter assembly. This allows the amount of airflow directly from the boiling chamber into the two regulating chambers to be nearly equal, thereby maintaining a consistent pressure within the boiling chamber and minimizing the impact on boiling in the boiling chamber.

[0026] The crushing mechanism crushes the material falling from the filter bag and guides the crushed material to the boiling chamber, thereby reducing the impact on the granularity of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic structural diagram of a fluidized bed drying and granulating machine provided in an embodiment of the present invention; Figure 2 A side view of a fluidized bed drying granulator provided by an embodiment of the present invention; Figure 3 for Figure 2 Cross-sectional view along the AA axis; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 A schematic structural diagram of a filter mechanism of a fluidized bed drying and granulating machine in a cleaning stage provided by an embodiment of the present invention; Figure 6 A schematic structural diagram of a filter mechanism of a fluidized bed drying and granulating machine in a working stage provided by an embodiment of the present invention; Figure 7 A schematic diagram of a partial structure of a fluidized bed drying and granulating machine provided in an embodiment of the present invention; Figure 8 An exploded view of a portion of the structure of a fluidized bed drying and granulating machine provided by an embodiment of the present invention; Figure 9 A schematic diagram of a partial structure of a filtering mechanism of a fluidized bed drying and granulating machine provided by an embodiment of the present invention; Figure 10 A schematic diagram of a portion of the structure of a transmission unit of a fluidized bed drying and granulating machine provided by an embodiment of the present invention; Figure 11 A schematic structural diagram of a ventilation plate and a rotating plate of a fluidized bed drying granulator provided in an embodiment of the present invention.

[0029] In the figure: 100, drying cylinder; 101, first air outlet; 102, second air outlet; 201, spray gun; 202, second motor; 203, fixing frame; 204, rubber column; 205, crushing disk; 206, eccentric shaft; 300, filter bag; 400, ventilation plate; 410, rotating plate; 411, first air hole; 412, first baffle; 413, second baffle; 420, connecting frame; 430, first channel; 431, first limiting groove; 432, first through groove; 440, second channel; 441, second limiting groove; 442, second through groove; 450, first cavity; 460, second cavity; 500, pressing plate; 510, push rod; 520, connecting rod; 521, magnet; 530, curved plate; 531, second air hole. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figures 1 to 11 As shown, an embodiment of the present invention provides a fluidized bed drying and granulating machine, comprising a drying cylinder 100, a filtering mechanism and a crushing mechanism. The drying cylinder 100 is vertically arranged, and the interior of the drying cylinder 100 is divided from top to bottom into a filtering chamber and a boiling chamber.

[0032] The filter mechanism includes a connecting frame 420, an adjustment assembly, a first drive assembly, a second drive assembly, and two filter assemblies arranged horizontally. The connecting frame 420 is fixedly mounted within the filter chamber. Each filter assembly includes multiple filter bags 300 mounted on the upper side of the connecting frame 420.

[0033] The adjustment assembly includes a ventilation plate 400 and a rotating plate 410. The ventilation plate 400 is fixed within the filter chamber and positioned below the connecting frame 420. Two ventilation channels are defined on the ventilation plate 400, corresponding to the two filter assemblies. The rotating plate 410 is rotatably mounted on the ventilation plate 400, dividing the space between the ventilation plate 400 and the connecting frame 420 into two adjustment chambers, each connected to the two ventilation channels. The rotating plate 410 is provided with a plurality of first air holes 411. The top of the drying cylinder 100 has openings corresponding to the two filter assemblies.

[0034] The filtering mechanism has a working stage and a cleaning stage. During the working stage, the first drive assembly rotates the rotating plate 410 according to the degree of blockage of the filter bag 300 in each filter assembly to change the volume of each regulating chamber. The degree of blockage of the filter bag 300 in each filter assembly is positively correlated with the volume of the corresponding regulating chamber to reduce the impact on the boiling of the boiling chamber. During the cleaning stage, the second drive assembly drives the filter bag 300 in one filter assembly to shake, and pushes the rotating plate 410 to block the ventilation channel corresponding to the other filter assembly. The crushing mechanism is arranged under the filter bag 300, and is used to receive and crush the material falling from the filter bag 300, and guide the crushed material to the boiling chamber.

[0035] The material is dried in the boiling chamber, and the filter bag 300 filters the hot and humid exhaust gas generated by the material reaction. When the filter mechanism is in the working stage: when the filter bags 300 in the two filter assemblies are blocked to the same degree, the rotating plate 410 is set vertically, and the volume of the two adjustment chambers is the same.

[0036] When the filter bag 300 in one filter assembly is clogged more than the filter bag 300 in the other filter assembly, the first drive assembly rotates the rotating plate 410, thereby making the volume of the regulating cavity corresponding to the filter assembly with the more serious clogged condition larger than the volume of the other regulating cavity.

[0037] At this time, the opening area of ​​the two regulating chambers near the boiling chamber remains unchanged. The opening area of ​​the regulating chamber with increased volume near the filter bag 300 increases. The opening area of ​​the regulating chamber with decreased volume near the filter bag 300 decreases.

[0038] A portion of the gas in the increased-volume regulating chamber flows upward and is filtered by the filter bag 300 in the corresponding filter assembly. A portion of the gas enters the decreased-volume regulating chamber through the first air holes 411 of the rotating plate 410, while the remaining portion of the gas directly enters the less clogged filter assembly. This ensures that the air intake of the two regulating chambers is not affected, remaining nearly equal, thereby minimizing the impact on boiling in the boiling chamber.

[0039] Cleaning Phase: When the filter bag 300 of one filter assembly is cleaned, the corresponding opening of that filter assembly is first sealed. A second drive assembly pushes the rotary plate 410 to seal the ventilation channel corresponding to the other filter assembly. Air passes through the first air holes 411 on the rotary plate 410, which reduces the amount of air flowing directly from the boiling chamber into the regulating chamber corresponding to the uncleaned filter assembly. This ensures that the amount of air flowing directly from the boiling chamber into both regulating chambers is nearly equal, thereby minimizing the impact on boiling in the boiling chamber.

[0040] The crushing mechanism crushes the material falling from the filter bag 300 and guides the crushed material to the boiling chamber, thereby reducing the impact on the granularity of the material.

[0041] In this embodiment, the two filter assemblies are a first filter bag assembly and a second filter bag assembly. The two ventilation channels are a first channel 430 corresponding to the first filter bag assembly and a second channel 440 corresponding to the second filter bag assembly. The two adjustment chambers are a first chamber 450 communicating with the first channel 430 and a second chamber 460 communicating with the second channel 440. Both the first chamber 450 and the second chamber 460 communicate with the interior of the filter bag 300.

[0042] A fluidized bed dryer granulator also includes a suction mechanism comprising an air pump. The two openings are a first air outlet 101 and a second air outlet 102. The first air outlet 101 corresponds to the first filter bag assembly. The second air outlet 102 corresponds to the second filter bag assembly. Both the first air outlet 101 and the second air outlet 102 communicate with the exterior of the filter bag 300.

[0043] Valves are provided at the first air outlet 101 and the second air outlet 102. An air pump is fixedly provided outside the drying cylinder 100, and is provided with two air pipes, which are communicated with the first air outlet 101 and the second air outlet 102 respectively.

[0044] The air pump is started to guide the hot and humid waste gas generated by the material reaction upward. The hot and humid waste gas is filtered by the filter bag 300 and then discharged outward from the first air outlet 101 and the second air outlet 102.

[0045] In this embodiment, the two filter assemblies are sequentially arranged in a first direction. The first drive assembly includes a first drive unit, which includes a first motor. The first motor is fixedly mounted on the ventilation plate 400. The output shaft of the first motor is arranged along a second direction. The second direction and the first direction are both horizontal, and the second direction is perpendicular to the first direction. The rotating plate 410 has two sides parallel to the second direction, namely a first side and a second side. The first side of the rotating plate 410 is rotatably connected to the ventilation plate 400. The output shaft of the first motor is fixedly connected to the first side of the rotating plate 410.

[0046] In this embodiment, pressure sensors are provided at both the first air outlet 101 and the second air outlet 102, and a controller is provided on the first motor. The controller controls the first motor to drive the rotating plate 410 to rotate according to the exhaust pressure detected by the pressure sensors at the first air outlet 101 and the second air outlet 102.

[0047] The lower the exhaust pressure at the first air outlet 101, the more severe the clogging of the filter bag 300 in the first filter bag assembly. When the exhaust pressure at the first air outlet 101 is lower than that at the second air outlet 102, the rotating plate 410 rotates so that the volume of the first chamber 450 is larger than that of the second chamber 460. When the exhaust pressure at the first air outlet 101 is higher than that at the second air outlet 102, the rotating plate 410 rotates so that the volume of the first chamber 450 is smaller than that of the second chamber 460.

[0048] In this embodiment, a first stopper 412 and a second stopper 413 are fixedly disposed on the second side of the rotating plate 410. A first limiting groove 431 and a first through-groove 432 are defined along the first direction on the side of the first channel 430 away from the second channel 440. A second limiting groove 441 and a second through-groove 442 are defined on the side of the second channel 440 away from the first channel 430. Both the first through-groove 432 and the second through-groove 442 extend through the ventilation plate 400. When the first stopper 412 and the first limiting groove 431 abut against each other, the second stopper 413 is positioned within the first through-groove 432. When the second stopper 413 and the second limiting groove 441 abut against each other, the first stopper 412 is positioned within the second through-groove 442. The first limiting groove 431 and the second limiting groove 441 are used to limit the position of the rotating plate 410. The provision of the first through-groove 432 and the second through-groove 442 prevents the first and second stoppers 412, 413 from interfering with the ventilation plate 400.

[0049] In this embodiment, the second drive assembly includes two transmission units, and the two transmission units correspond to the two filter assemblies one by one. Each transmission unit includes a pressure plate 500, a push rod 510 and a hydraulic cylinder. The push rod 510 is vertically arranged and is slidably arranged on the connecting frame 420. The lower side of the push rod 510 is used to abut against the rotating plate 410. The pressure plate 500 is horizontally arranged, and the upper ends of the pressure plate 500 and the push rod 510 are fixedly connected. The filter bags 300 are vertically arranged, and each pressure plate 500 is fixedly connected to the upper ends of the multiple filter bags 300 in the corresponding filter assembly. The hydraulic cylinder is fixedly arranged in the drying cylinder 100, and the extended end of the hydraulic cylinder is vertically arranged, and the extended end of each hydraulic cylinder is fixedly connected to a pressure plate 500.

[0050] The extended end of the hydraulic cylinder continuously extends and contracts, driving the pressing plate 500 to continuously move up and down, thereby cleaning the filter bag 300.

[0051] In this embodiment, each transmission unit further includes a connecting rod 520 and a magnet 521. The connecting rod 520 is vertically arranged, and the connecting rod 520 and the push rod 510 are sequentially distributed along the first direction. The connecting rod 520 is located on a side away from the rotating plate 410 relative to the push rod 510. The upper end of the connecting rod 520 is fixedly connected to the lower side of the pressure plate 500. The magnet 521 is fixedly arranged at the lower end of the connecting rod 520. The length of the connecting rod 520 is greater than the length of the push rod 510.

[0052] The magnet 521 corresponding to the first filter bag assembly and the second baffle 413 magnetically repel each other, thereby pushing the rotating plate 410 toward the second channel 440. The magnet 521 corresponding to the second filter bag assembly and the first baffle 412 magnetically repel each other, thereby pushing the rotating plate 410 toward the first channel 430, thereby preventing the rotating plate 410 from obstructing the downward movement of the push rod 510.

[0053] In this embodiment, a curved plate 530 is fixedly mounted on the lower side of the connecting frame 420. The curved plate 530 is arranged along the second direction. The concave surface of the curved plate 530 faces the rotating plate 410 and abuts against the second side of the rotating plate 410. The curved plate 530 is provided with a plurality of second air holes 531. The curved plate 530 also has first through-holes for the push rods 510 and the connecting rods 520 to pass through.

[0054] When the rotating plate 410 is tilted, part of the gas passes through the second air holes 531 on the curved plate 530 and enters the filter bag 300, preventing the gas from directly entering the other regulating cavity from one regulating cavity and disturbing the gas in the other regulating cavity.

[0055] In this embodiment, the crushing mechanism includes a fixed frame 203, a crushing disk 205, an eccentric shaft 206, a second motor 202, and a plurality of rubber columns 204. The fixed frame 203 is fixedly mounted within the drying drum 100. The eccentric shaft 206 is coaxially disposed with the drying drum 100. The lower end of the eccentric shaft 206 is rotatably connected to the fixed frame 203. The crushing disk 205 is positioned above the fixed frame 203. The crushing disk 205 is fixedly connected to the upper end of the eccentric shaft 206, and the crushing disk 205 and the eccentric shaft 206 are eccentrically disposed. The crushing disk 205 is provided with a plurality of crushing holes.

[0056] Multiple rubber columns 204 are distributed along the circumference of the crushing disk 205. Each rubber column 204 has its upper end connected to the crushing disk 205 and its lower end connected to the mounting bracket 203. The rubber columns 204 are made of rubber and are flexible and deformable. The second motor 202 is fixed to the mounting bracket 203. The output shaft of the second motor 202 is vertically mounted and fixedly connected to the eccentric shaft 206.

[0057] The second motor 202 is activated, driving the eccentric shaft 206, which in turn drives the crushing disk 205 to rotate eccentrically. Small materials that fit within the diameter of the crushing holes pass through the holes and return to the boiling chamber. The circumferential wall of the crushing disk 205 contacts the circumferential wall of the drying cylinder 100, crushing and grinding larger materials that do not fit within the diameter of the crushing holes. The crushed materials return to the boiling chamber, minimizing the impact on the particle size of the pellets.

[0058] In this embodiment, a fluidized bed drying and granulating machine further includes a fluidizing mechanism comprising a heater, a fan, and a spray gun 201. The heater, fan, and spray gun 201 are disposed within a fluidizing chamber. The heater heats the material, while the fan provides fluid power. The spray gun 201 is used to spray an adhesive onto the material within the fluidizing chamber. The spray gun 201 atomizes the adhesive solution into micron-sized droplets, which are evenly sprayed onto the surface of the tumbling solid particulate material within the fluidizing chamber. A feed inlet is defined within the drying cylinder 100 and communicates with the fluidizing chamber.

[0059] Working process: In the initial state, the valves at the first air outlet 101 and the second air outlet 102 are in the open state. The lower ends of the push rod 510 and the connecting rod 520 do not exceed the concave surface of the arc plate 530.

[0060] First, solid particles are fed into the boiling chamber from the feed port, the heater is started to heat the material, the fan is started to make the material flow, and the spray gun 201 is started to atomize the adhesive solution into micron-sized droplets, which are evenly sprayed onto the surface of the tumbling solid particles in the boiling chamber.

[0061] At the same time, the air pump is started to guide the hot and humid waste gas generated by the material reaction upward. The hot and humid waste gas is filtered by the filter bag 300 and then discharged from the first air outlet 101 and the second air outlet 102. At this time, the filtering mechanism is in the working stage.

[0062] When the blockage degree of the filter bags 300 in the first filter bag assembly and the second filter bag assembly is the same, the exhaust pressure at the first air outlet 101 and the second air outlet 102 is the same, so the rotating plate 410 is set vertically, and the volume of the first cavity 450 and the second cavity 460 is the same.

[0063] When the filter bag 300 in the first filter bag assembly is more clogged than the filter bag 300 in the second filter bag assembly, the exhaust pressure at the first air outlet 101 is lower than the exhaust pressure at the second air outlet 102. Therefore, the pressure sensor controls the first motor through the controller to rotate the rotating plate 410. The rotating plate 410 moves toward the first channel 430, thereby increasing the volume of the first chamber 450 to be larger than the volume of the second chamber 460.

[0064] At this time, the opening area of ​​the first cavity 450 and the second cavity 460 near the boiling cavity does not change. The opening area of ​​the first cavity 450 near the filter bag 300 increases, and the opening area of ​​the second cavity 460 near the filter bag 300 decreases.

[0065] Because the filter bag 300 in the first filter bag assembly is more clogged, some of the gas entering the first chamber 450 is filtered upward by the filter bag 300 in the first filter bag assembly. Some of the gas enters the second chamber 460 through the first air holes 411 in the rotating plate 410 and is then filtered by the filter bag 300 in the second filter bag assembly. Another portion of the gas enters the second filter bag assembly through the second air holes 531 in the curved plate 530. This does not affect the air intake of the first and second chambers 450, 460, keeping the intake volumes close to the same, thereby minimizing the impact on boiling in the boiling chamber.

[0066] When both the filter bags 300 in the first and second filter bag assemblies are severely clogged, cleaning of the filter bags 300 begins. Rotating plate 410 is positioned vertically. Cleaning of the filter bag 300 in the first filter bag assembly begins, and the valve at first air outlet 101 is closed. The filter mechanism is now in the cleaning phase.

[0067] Since the valve at the first air outlet 101 is closed, most of the airflow rising from the boiling chamber enters the second chamber 460. A small amount of airflow enters the first chamber 450, passes through the second air holes 531 on the rotating plate 410, and then enters the first air holes 411. This results in different gas flow rates on the upper side of the boiling chamber, which affects boiling in the boiling chamber.

[0068] At this point, the hydraulic cylinder corresponding to the first filter bag assembly is activated. The extended end of the hydraulic cylinder extends first, driving the corresponding pressure plate 500, push rod 510, and connecting rod 520 of the first filter bag assembly downward in a synchronous manner. Because the connecting rod 520 is longer than the push rod 510, the lower end of the connecting rod 520 first extends beyond the concave surface of the curved plate 530. The magnet 521 corresponding to the first filter bag assembly and the second stopper 413 magnetically repel each other, pushing the rotating plate 410 toward the second channel 440, facilitating the downward movement of the push rod 510.

[0069] Then the push rod 510 contacts the rotating plate 410 , and the push rod 510 continues to move downward to push the rotating plate 410 to continue rotating until the second blocking piece 413 and the second limiting groove 441 abut against each other, and the first blocking piece 412 is located in the second through groove 442 .

[0070] The rotating plate 410 blocks the second channel 440, and the gas passes through the first air hole 411 on the rotating plate 410. The rotating plate 410 reduces the amount of air directly entering the second cavity 460 from the boiling cavity, so that the amount of air directly entering the first cavity 450 and the second cavity 460 from the boiling cavity is close to the same, thereby reducing the impact on boiling in the boiling cavity.

[0071] The extended end of the hydraulic cylinder then shortens, moving the pressure plate 500 upward. The extended end of the hydraulic cylinder continues to lengthen and shorten, driving the pressure plate 500 up and down, thereby cleaning the filter bag 300. The cleaned impurities fall onto the crushing disk 205. Simultaneously, the second motor 202 is activated, rotating the eccentric shaft 206, which in turn drives the eccentric rotation of the crushing disk 205. Small materials that fit within the diameter of the crushing hole pass through the crushing hole and return to the boiling chamber. The peripheral wall of the crushing disk 205 contacts the peripheral wall of the drying cylinder 100, crushing and grinding larger materials that do not fit within the diameter of the crushing hole. The crushed material returns to the boiling chamber, minimizing the impact on the particle size of the pelletized material.

[0072] After the first filter bag assembly is cleaned, the valve at the first air outlet 101 is opened, the valve at the second air outlet 102 is closed, and the first motor is activated to return the rotating plate 410 to its initial vertical position. The hydraulic cylinder corresponding to the second filter bag assembly is then activated to clean the second filter bag assembly. A fluidized bed dryer granulator can clean the filter bags 300 without shutting down the machine, resulting in higher efficiency.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fluidized bed drying granulator, characterized in that: The device comprises a drying cylinder, a filtering mechanism and a crushing mechanism; the drying cylinder is arranged vertically, and the interior of the drying cylinder is divided from top to bottom into a filtering chamber and a boiling chamber; the filtering mechanism comprises a connecting frame, an adjustment assembly, a first drive assembly, a second drive assembly and two filtering assemblies distributed horizontally; the connecting frame is located in the filtering chamber; each filtering assembly comprises a plurality of filter bags located on the upper side of the connecting frame; The regulating assembly includes a ventilation plate and a rotating plate; the ventilation plate is disposed in the filter cavity and below the connecting frame, and is provided with two ventilation channels, one corresponding to each of the two filter assemblies; the rotating plate is rotatably disposed on the ventilation plate and divides the space between the ventilation plate and the connecting frame into two regulating cavities, each of which is connected to the two ventilation channels; the rotating plate is provided with a first air hole; and the drying cylinder is provided with openings, one corresponding to each of the two filter assemblies. The filter mechanism has a working phase and a cleaning phase. During the working phase, the first drive assembly rotates the rotating plate according to the degree of blockage of the filter bag in each filter assembly to change the volume of each regulating cavity. The degree of blockage of the filter bag in each filter assembly is positively correlated with the volume of the corresponding regulating cavity to reduce the impact on boiling in the boiling cavity. During the cleaning phase, the second drive assembly drives the filter bag in one filter assembly to vibrate, and pushes the rotating plate to block the ventilation channel corresponding to the other filter assembly; The crushing mechanism is located below the filter bag and is used to crush the material falling from the filter bag and guide the crushed material to the boiling chamber.

2. The fluidized bed drying granulator according to claim 1, characterized in that: The two filter assemblies are respectively a first filter bag assembly and a second filter bag assembly; the two ventilation channels are respectively a first channel corresponding to the first filter bag assembly and a second channel corresponding to the second filter bag assembly; the two adjustment chambers are respectively a first chamber communicating with the first channel and a second chamber communicating with the second channel; A fluidized bed drying granulator further includes a suction mechanism, which includes an air pump; two openings are respectively a first air outlet and a second air outlet; the first air outlet corresponds to the first filter bag assembly; the second air outlet corresponds to the second filter bag assembly; Valves are provided at the first air outlet and the second air outlet; an air pump is fixedly arranged outside the drying cylinder, and two air pipes are provided on the air pump, which are respectively connected to the first air outlet and the second air outlet.

3. The fluidized bed drying granulator according to claim 2, characterized in that: The direction in which the two filter components are distributed in sequence is the first direction; the first drive component includes a first drive unit, the first drive unit includes a first motor, the first motor is fixedly arranged on the ventilation plate, the output shaft of the first motor is arranged along the second direction, the second direction and the first direction are both horizontal directions, and the second direction is perpendicular to the first direction; the two sides of the rotating plate parallel to the second direction are the first side and the second side respectively, the first side of the rotating plate is rotatably connected to the ventilation plate; the output shaft of the first motor is fixedly connected to the first side of the rotating plate.

4. The fluidized bed drying granulator according to claim 3, characterized in that: Pressure sensors are provided at both the first and second air outlets, and a controller is provided on the first motor; the controller controls the first motor to drive the rotating plate to rotate according to the exhaust pressure detected by the pressure sensors at the first and second air outlets; The smaller the exhaust pressure of the first air outlet, the more serious the blockage of the filter bag in the first filter bag assembly; when the exhaust pressure of the first air outlet is lower than that of the second air outlet, the rotating plate rotates so that the volume of the first cavity is larger than that of the second cavity; when the exhaust pressure of the first air outlet is higher than that of the second air outlet, the rotating plate rotates so that the volume of the first cavity is smaller than that of the second cavity.

5. The fluidized bed drying granulator according to claim 3, characterized in that: A first baffle and a second baffle are fixedly provided on the second side of the rotating plate; along the first direction, a first limiting groove and a first through groove are provided on the side of the first channel away from the second channel; a second limiting groove and a second through groove are provided on the side of the second channel away from the first channel; when the first baffle and the first limiting groove are against each other, the second baffle is in the first through groove; when the second baffle and the second limiting groove are against each other, the first baffle is in the second through groove; the first limiting groove and the second limiting groove are used to limit the rotating plate.

6. The fluidized bed drying granulator according to claim 5, characterized in that: The second drive assembly includes two transmission units, and the two transmission units correspond to the two filter assemblies one by one; each transmission unit includes a pressure plate, a push rod and a hydraulic cylinder; the push rod is vertically arranged, and the push rod is slidably arranged on the connecting frame; the lower side of the push rod is used to resist the rotating plate; the pressure plate is horizontally arranged, and the upper end of the pressure plate and the push rod are fixedly connected; the filter bags are vertically arranged, and each pressure plate is fixedly connected to the upper ends of multiple filter bags in the corresponding filter assembly; the hydraulic cylinder is fixedly arranged in the drying cylinder, and the extended end of the hydraulic cylinder is vertically arranged, and the extended end of each hydraulic cylinder is fixedly connected to a pressure plate.

7. The fluidized bed drying granulator according to claim 6, characterized in that: Each transmission unit further includes a connecting rod and a magnet; the connecting rod is vertically arranged, and the connecting rod and the push rod are sequentially distributed along the first direction; the connecting rod is located on a side away from the rotating plate relative to the push rod; the upper end of the connecting rod is fixedly connected to the lower side of the pressure plate; the magnet is fixedly arranged at the lower end of the connecting rod; the length of the connecting rod is greater than the length of the push rod; The magnet corresponding to the first filter bag assembly and the second baffle magnetically repel each other, so as to push the rotating plate to deflect toward the second channel; the magnet corresponding to the second filter bag assembly and the first baffle magnetically repel each other, so as to push the rotating plate to deflect toward the first channel.

8. The fluidized bed drying granulator according to claim 3, characterized in that: An arc plate is fixedly provided on the lower side of the connecting frame, and the arc plate is arranged along the second direction; the concave surface of the arc plate faces the rotating plate and abuts against the second side of the rotating plate; a plurality of second air holes are opened on the arc plate.

9. The fluidized bed drying granulator according to claim 1, characterized in that: The crushing mechanism includes a fixed frame, a crushing disc, an eccentric shaft, a second motor, and a plurality of rubber columns; the fixed frame is fixedly arranged in the drying cylinder; the eccentric shaft and the drying cylinder are arranged coaxially; the lower end of the eccentric shaft is rotatably connected to the fixed frame; the crushing disc is located above the fixed frame, the crushing disc is fixedly connected to the upper end of the eccentric shaft, and the crushing disc and the eccentric shaft are eccentrically arranged; the crushing disc is provided with a plurality of crushing holes; Multiple rubber columns are distributed in sequence along the circumference of the crushing disk; the upper end of each rubber column is connected to the crushing disk, and the lower end is connected to the fixing frame; the second motor is fixedly set on the fixing frame, the output shaft of the second motor is vertically set, and the output shaft of the second motor is fixedly connected to the eccentric rotating shaft.

10. The fluidized bed drying granulator according to claim 1, characterized in that: It also includes a boiling mechanism, which includes a heater, a fan and a spray gun; the heater, the fan and the spray gun are arranged in a boiling chamber; the heater heats the material, and the fan provides fluid power; the spray gun is used to spray adhesive onto the material in the boiling chamber; a feed port is opened in the drying cylinder, and the feed port is connected to the boiling chamber.

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