Fluidized drying machine dust removal mechanism for powder production

Abstract

The utility model relates to the technical field of powder production equipment, and discloses a dust removal mechanism of a boiling dryer for powder production, which comprises a shell, a rotating shaft and a dust removal cloth bag are arranged at the top of the shell, the rotating shaft is connected with a back-blowing dust removal assembly, the back-blowing dust removal assembly comprises a back-blowing pipe, a dust receiving groove and a dust discharge channel, a back-blowing nozzle is arranged on the inner ring wall of the back-blowing pipe, and the dust removal cloth bag is connected with the back-blowing nozzle. The blowback pipe is connected to the rotating shaft through a lifting assembly, a communicating cavity is formed in the bottom end of the rotating shaft, the ash receiving groove is fixed to the rotating shaft through a connecting pipe, the ash discharging channel is fixed to the shell, and the top end of the ash discharging channel is arranged on the outer side of the rotating shaft and communicates with the communicating cavity. According to the utility model, on-line back-blowing dust removal of the dust collecting bag can be realized, the dust collecting effect is ensured, and the frequency of dismounting the dust collecting bag for cleaning and stopping for overhauling is reduced, so that the production continuity is ensured, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder production equipment, in particular to a dust removal mechanism of a boiling dryer for powder production. Background Art

[0002] Fluidizing dryer heats the air through heat exchanger to form hot air. The clean hot air is distributed into the fluidizing dryer body through valve plate. The wet material entering the dryer body from the feeder is boiled by the hot air. Since the hot air is in extensive contact with the material, the heat and mass transfer process is increased, so the material can be dried in a shorter time. Fluidizing dryer can be used for drying pharmaceuticals, chemical raw materials, food, grain processing, and feed.

[0003] When using a fluidized bed dryer, the exhaust gas generated will be extracted by an induced draft fan. In order to prevent the material from being carried away by the airflow, a dust removal mechanism will be set up. In the prior art, dust removal bags are generally used to remove dust from the exhaust gas. However, a large amount of powder will adhere to the dust removal bags during use, making it impossible to perform online dust cleaning, which affects the dust removal effect. Therefore, based on the above technical problems, it is necessary to solve them. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the utility model provides a dust removal mechanism of a boiling dryer for powder production.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dust removal mechanism of a boiling dryer for powder production, comprising a shell, an air inlet pipe is arranged at the bottom of the shell, a rotating shaft and a plurality of cylindrical dust removal bags evenly arranged along the circumference of the rotating shaft are arranged at the top of the shell, the rotating shaft is rotatably connected to the shell and connected to a driving assembly, a back-blowing cleaning assembly is connected to the rotating shaft, the dust removal bag is fixed to the shell, the top end of the dust removal bag is closed, the bottom end passes through the top wall of the shell and is connected to the inside of the shell, the ... back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing cleaning assembly is connected to the rotating shaft, the back-blowing The ash cleaning component includes a backblowing pipe, an ash receiving trough, and an ash discharge channel. The backblowing pipe is annular, and a plurality of backblowing nozzles spraying toward the center are provided on the inner ring wall of the backblowing pipe. The backblowing pipe is connected to the rotating shaft through a lifting component. The bottom end of the rotating shaft extends into the shell and is provided with a connecting cavity. The ash receiving trough is coaxially arranged with the backblowing pipe, and the ash receiving trough is arranged in the shell and fixed to the rotating shaft through a connecting pipe. The ash discharge channel is fixed to the shell, and the top end of the ash discharge channel is arranged on the outside of the rotating shaft and is connected to the connecting cavity. The rotating shaft and the ash discharge channel are in a rotating seal fit.

[0006] When in use, the air inlet pipe is connected to the exhaust pipe of the boiling dryer. The dust-containing gas discharged by the boiling dryer enters the shell through the air inlet pipe, and then enters each dust removal bag from the bottom. The dust removal bag retains the dust in the dust-containing gas on its inner surface, and the gas is discharged through the dust removal bag, thereby achieving dust removal.

[0007] When it is necessary to clean a dust bag, the shaft is rotated by the driving component, and the back-blowing pipe and the ash receiving slot rotate with the shaft until the back-blowing pipe is located directly above the dust bag to be cleaned. At this time, the ash receiving slot is located just below the dust bag to seal the dust bag; the lifting component drives the back-blowing pipe to move downward along the axial direction of the dust bag, so that the back-blowing pipe is sleeved on the outside of the dust bag, and clean blowing gas is introduced into the back-blowing pipe. The blowing gas is sprayed from the back-blowing nozzle to the dust bag to back-blow and clean the dust bag. The dust attached to the inner surface of the dust bag is blown into the ash receiving slot, enters the connecting cavity through the connecting pipe, and is then discharged from the ash discharge channel; when cleaning, the lifting component drives the back-blowing pipe to move downward, thereby realizing comprehensive back-blowing and cleaning of the dust bag.

[0008] Preferably, the driving assembly comprises bevel gear 1, bevel gear 2 and a driving motor, wherein bevel gear 1 is connected to the rotating shaft, and bevel gear 2 is meshed with bevel gear 1 and connected to the driving motor.

[0009] This arrangement can avoid position interference between the blowback pipe and the drive assembly when the shaft rotates.

[0010] Preferably, an air inlet cavity is opened at the top end of the rotating shaft and is connected with a rotating joint, and the backflush pipe is connected to the air inlet cavity through a telescopic hose.

[0011] Air intake of the back-blowing tube is achieved through the rotating joint, the air intake cavity and the telescopic hose, which can prevent the telescopic hose from being knotted or entangled when rotating with the rotating shaft, thereby ensuring normal air intake of the back-blowing tube.

[0012] Preferably, two fixed plates are relatively provided on the rotating shaft, and the lifting assembly includes a threaded rod and a guide rod. The threaded rod is rotatably connected between the two fixed plates and is connected to a lifting motor. The guide rod is fixedly connected between the two fixed plates. A connecting plate is provided on the backblowing pipe, and the connecting plate is provided with an internal threaded hole that cooperates with the threaded rod and a guide hole that slidably cooperates with the guide rod.

[0013] The backblowing tube can be raised and lowered by threads.

[0014] Preferably, a guiding slope is provided in the ash receiving trough.

[0015] The connecting pipe is connected to the lowest point of the guiding slope in the ash receiving trough. The connecting pipe is inclined and connected to the guiding slope to facilitate the falling and discharge of dust.

[0016] Preferably, a sealing gasket is provided on the top surface of the ash receiving trough.

[0017] The top surface of the ash receiving trough is flush with the bottom surface of the dust bag. When the dust is not being cleaned, the ash receiving trough is deflected to one side of the dust bag to ensure normal air intake of the dust bag. When the dust bag is being cleaned, the top surface of the ash receiving trough abuts against the bottom surface of the dust bag, and the sealing gasket seals the abutment to prevent the sprayed gas from leaking into the shell.

[0018] The utility model also includes other components that enable the dust removal mechanism of a fluidized bed dryer for powder production to be used normally, which are all conventional technical means in the art. In addition, the devices or components not limited in the utility model all adopt conventional technical means in the art.

[0019] The utility model can realize online back-blowing cleaning of the dust removal bag, ensure the dust removal effect, reduce the frequency of removing the dust removal bag for cleaning and stopping the machine for maintenance, thereby ensuring the continuity of production and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0021] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the middle shell.

[0022] Figure 3 yes Figure 1 AA view.

[0023] Figure 4 yes Figure 1 Partial axial section of the rotating shaft.

[0024] In the figure: 1. Shell; 2. Air inlet pipe; 3. Rotating shaft; 4. Dust bag; 5. Backflush pipe; 6. Ash receiving trough; 7. Ash discharge channel; 8. Backflush nozzle; 9. Connecting chamber; 10. Connecting pipe; 11. Driving motor; 12. Air inlet chamber; 13. Rotating joint; 14. Telescopic hose; 15. Threaded rod; 16. Guide rod; 17. Connecting plate; 18. Guide ramp; 19. Sealing gasket. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example

[0029] See also Figure 1-4 A dust removal mechanism of a fluidized bed dryer for powder production, comprising a shell 1, an air inlet pipe 2 is arranged at the bottom of the shell, a rotating shaft 3 and a plurality of cylindrical dust removal bags 4 arranged evenly along the circumference of the rotating shaft are arranged at the top of the shell, the rotating shaft 3 is rotatably connected to the shell and connected to a driving component, a back-blowing cleaning component is connected to the rotating shaft 3, the dust removal bag 4 is fixed to the shell, the top of the dust removal bag 4 is closed, the bottom end passes through the top wall of the shell and is connected to the inside of the shell, the back-blowing cleaning component comprises a back-blowing pipe 5, an ash receiving trough 6, an exhaust Ash channel 7, the backblowing pipe 5 is annular, and a plurality of backblowing nozzles 8 spraying toward the center are arranged on the inner ring wall of the backblowing pipe 5, the backblowing pipe 5 is connected to the rotating shaft 3 through a lifting assembly, the bottom end of the rotating shaft 3 extends into the shell and is provided with a connecting cavity 9, the ash receiving groove 6 is coaxially arranged with the backblowing pipe 5, the ash receiving groove 6 is arranged in the shell and is fixed to the rotating shaft 3 through a connecting pipe 10, the ash discharge channel 7 is fixed to the shell, the top end of the ash discharge channel 7 is arranged on the outside of the rotating shaft 3 and is connected with the connecting cavity, and the rotating shaft 3 and the ash discharge channel 7 are in a rotating seal fit.

[0030] In this embodiment, four dust bags 4 are provided, and the dust bags 4 are mounted outside the fixed frame for shaping. In actual use, they can be replaced by equivalent products with the same function and shape (such as dust collection cylinders, etc.); the axis of the backblowing pipe and the axis of the dust bag are located on the same circumference with the rotating shaft 3 as the center; the ash receiving trough 6 and the connecting cavity are connected through a connecting pipe.

[0031] When in use, the air inlet pipe is connected to the exhaust pipe of the boiling dryer. The dust-containing gas exhausted by the boiling dryer enters the shell through the air inlet pipe 2, and then enters each dust removal bag 4 from the bottom. The dust removal bag 4 retains the dust in the dust-containing gas on its inner surface, and the gas is discharged through the dust removal bag, thereby achieving dust removal.

[0032] When it is necessary to clean a certain dust bag 4, the driving component rotates the rotating shaft 3, and the back-blowing pipe 5 and the ash receiving slot rotate with the rotating shaft 3 until the back-blowing pipe 5 is located directly above the dust bag to be cleaned. At this time, the ash receiving slot 6 is located just below the dust bag 4 to block the dust bag 4; the lifting component drives the back-blowing pipe 5 to move downward along the axial direction of the dust bag 4, so that the back-blowing pipe is sleeved on the outside of the dust bag, and clean blowing gas is introduced into the back-blowing pipe 5. The blowing gas is sprayed from the back-blowing nozzle to the dust bag 4, and the dust bag 4 is back-blown and cleaned. The dust attached to the inner surface of the dust bag 4 is blown into the ash receiving slot 6, and enters the connecting cavity through the connecting pipe, and then is discharged from the ash discharge channel 7; when cleaning, the lifting component drives the back-blowing pipe to move downward, thereby realizing comprehensive back-blowing and cleaning of the dust bag 4.

[0033] When back-blowing and cleaning one of the dust bags is performed, the normal dust removal of other dust bags will not be affected, so the dust bags can be cleaned online.

[0034] The lower part of the ash discharge channel 7 is inclined to facilitate dust discharge; an ash discharge valve is provided at the outlet of the ash discharge channel 7. When backblowing is not performed for dust cleaning, the ash discharge valve is closed to prevent external gas from entering the shell and increasing the workload of dust removal. When cleaning, the ash discharge valve is opened to facilitate the discharge of backblowing gas and blown dust.

[0035] The driving assembly includes a bevel gear 1, a bevel gear 2 and a driving motor 11. The bevel gear 1 is connected to the rotating shaft 3, and the bevel gear 2 is meshed with the bevel gear 1 and connected to the driving motor.

[0036] In this embodiment, a top plate is fixed above the shell, the dust bag and the back-blowing pipe 5 are both arranged below the top plate, the top end of the rotating shaft 3 extends above the top plate, and the driving motor is fixed on the top plate. This arrangement can avoid position interference between the back-blowing pipe 5 and the driving component when the rotating shaft rotates.

[0037] An air inlet cavity 12 is formed at the top of the rotating shaft 3 and is connected to a rotary joint 13 . The backflush pipe 5 is connected to the air inlet cavity 12 via a telescopic hose 14 .

[0038] The inlet of the rotary joint 13 is connected to the air source, and the outlet is connected to the air inlet chamber 12. In this embodiment, the air intake of the backblowing tube is achieved through the rotary joint, the air inlet chamber, and the telescopic hose, which can avoid the telescopic hose from being knotted or entangled when rotating with the rotating shaft, thereby ensuring the normal air intake of the backblowing tube 5.

[0039] Two fixed plates are relatively arranged on the rotating shaft 3, and the lifting assembly includes a threaded rod 15 and a guide rod 16. The threaded rod 15 is rotatably connected between the two fixed plates and is connected to a lifting motor. The guide rod 16 is fixedly connected between the two fixed plates. A connecting plate 17 is provided on the backblowing pipe 5. The connecting plate 17 is provided with an internal threaded hole threadably matched with the threaded rod 15 and a guide hole slidably matched with the guide rod 16.

[0040] The backblowing tube 5 can be lifted and lowered by means of threads.

[0041] A guiding inclined surface 18 is provided in the ash receiving groove 6 .

[0042] In this embodiment, the connecting pipe is connected to the lowest point of the guiding inclined surface in the dust receiving trough. The connecting pipe is inclined and connected to the guiding inclined surface to facilitate the falling and discharge of dust.

[0043] A sealing gasket 19 is provided on the top surface of the ash receiving trough 6 .

[0044] In the present embodiment, the top surface of the ash receiving groove 6 is flush with the bottom surface of the dust bag 4. When the dust is not cleaned, the ash receiving groove 6 is deflected to one side of the dust bag 4 to ensure the normal air intake of the dust bag 4; when the dust bag 4 is cleaned, the top surface of the ash receiving groove 6 abuts against the bottom surface of the dust bag 4, and the sealing gasket seals the abutment to prevent the sprayed gas from leaking into the shell.

[0045] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A dust removal mechanism for a fluidized bed dryer for powder production, comprising a housing, characterized in that: The bottom of the shell is provided with an inlet pipe, the top of the shell is provided with a rotating shaft and a plurality of cylindrical dust bags evenly arranged along the circumference of the rotating shaft, the rotating shaft is rotatably connected to the shell and is connected to a driving assembly, the rotating shaft is connected to a back-blowing cleaning assembly, the dust bag is fixed on the shell, the top of the dust bag is closed, the bottom end passes through the top wall of the shell and is connected with the interior of the shell, the back-blowing cleaning assembly comprises a back-blowing pipe, an ash receiving groove, and an ash discharge channel, the back-blowing pipe is annular, and a plurality of back-blowing nozzles that spray toward the center are provided on the inner ring wall of the back-blowing pipe, the back-blowing pipe is connected to the rotating shaft through a lifting assembly, the bottom end of the rotating shaft extends into the shell and is provided with a connecting cavity, the ash receiving groove is coaxially arranged with the back-blowing pipe, the ash receiving groove is arranged in the shell and is fixed to the rotating shaft through a connecting pipe, the ash discharge channel is fixed on the shell, the top of the ash discharge channel is arranged on the outside of the rotating shaft and is connected with the connecting cavity, and the rotating shaft and the ash discharge channel are rotatably sealed.

2. The dust removal mechanism of a fluidized bed dryer for powder production according to claim 1, characterized in that: The driving assembly comprises a bevel gear 1, a bevel gear 2 and a driving motor. The bevel gear 1 is connected to the rotating shaft, and the bevel gear 2 is meshed with the bevel gear 1 and connected to the driving motor.

3. The dust removal mechanism of a fluidized bed dryer for powder production according to claim 1, characterized in that: An air inlet cavity is provided at the top end of the rotating shaft and is connected with a rotating joint, and the backflush pipe is connected with the air inlet cavity through a telescopic hose.

4. The dust removal mechanism of a fluidized bed dryer for powder production according to claim 1, characterized in that: Two fixed plates are arranged opposite to each other on the rotating shaft, and the lifting assembly includes a threaded rod and a guide rod. The threaded rod is rotatably connected between the two fixed plates and is connected to a lifting motor. The guide rod is fixedly connected between the two fixed plates. A connecting plate is arranged on the backblowing pipe, and an internal threaded hole which is threadably matched with the threaded rod and a guide hole which is slidably matched with the guide rod are provided on the connecting plate.

5. The dust removal mechanism of a fluidized bed dryer for powder production according to claim 1, characterized in that: A guiding inclined surface is arranged in the ash receiving groove.

6. The dust removal mechanism of a fluidized bed dryer for powder production according to claim 1, characterized in that: A sealing gasket is arranged on the top surface of the ash receiving trough.

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