Anti-caking cloth bag dust collector

Abstract

This invention relates to an anti-caking baghouse dust collector, comprising an outer shell, which is a rectangular shell with an opening at the bottom and an air inlet at the left end. An inner shell is located in the middle of the outer shell, with an air outlet at the upper end. A first rotating shaft is located within the inner shell cavity, and multiple bushings are fitted onto the first rotating shaft along its axis. A through hole is located at the projection position of all bushings on the front and rear end faces of the inner shell. Each through hole contains a second rotating shaft, and each second rotating shaft has a turntable at one end. A filter bag is located between each turntable and the inner shell. Each second rotating shaft has a slider and a disc. When the first rotating shaft rotates, the slider can reciprocate along the second rotating shaft. When the slider reciprocates along the second rotating shaft, the second rotating shaft can rotate around its axis. This invention uses a motor to drive the filter bags on both sides to twist alternately, unscrewing the caking bags without affecting normal gas filtration, thus greatly improving dust removal efficiency.

Description

Technical Field

[0001] This invention relates to the field of fertilizer drying, specifically to an anti-caking bag filter dust collector. Background Technology

[0002] Because fertilizer granulation and drying processes generate a large amount of dust, fertilizer production workshops often require dust removal equipment. Existing fertilizer dust removal equipment is mostly baghouse dust collectors. Baghouse dust collectors have stable dust removal effects and high dust removal efficiency, and can effectively remove more than 99% of dust in the air. However, in addition to the dust generated by the fertilizer drying process, the airflow during the drying process also carries water vapor evaporated from the fertilizer. After passing through the baghouse, the dust carrying water vapor will adhere to the baghouse. As the filtration time increases, fertilizer clumps of different sizes will form, causing bag clogging, which seriously affects the filtration efficiency of the baghouse dust collector.

[0003] Existing technologies include cleaning the filter bags by vibrating them. For example, CN106731293 B discloses a self-priming cleaning vehicle filter bag vibration dust removal device. Although vibration can effectively clean dust that clogs the filter bags, it is not ideal for cleaning clumps. Compared to dust, clumps are more firmly fixed to the filter bags. Summary of the Invention

[0004] To address the aforementioned problems, this invention employs an anti-caking bag filter, which solves the problem of dust generated during fertilizer drying caking on the filter bags and thus affecting the filter bag filtration efficiency.

[0005] The technical solution includes an outer shell, which is a rectangular shell with an opening at the bottom. An air inlet is provided at the left end of the outer shell. A rectangular inner shell is located in the middle of the outer shell. An air outlet pipe is fixed at the upper end of the inner shell and communicates with the cavity of the inner shell. The upper end of the air outlet pipe passes through the outer shell. A first rotating shaft is placed horizontally in the inner shell cavity. The first rotating shaft can rotate freely around its axis. Multiple bushings are fitted on the first rotating shaft along its axis. The bushings are rotatably connected to the first rotating shaft. A through hole is provided on the front and rear end faces of the inner shell at the projection positions of all bushings. A second rotating shaft is placed horizontally in each through hole. The ends of the second rotating shafts are rotatably connected to the corresponding side of the outer shell and bushings. A turntable is provided at the end of each second rotating shaft near the outer shell. The turntable can move along the axis of the second rotating shaft and can rotate with the second rotating shaft. A cylindrical cloth bag is fixedly connected to each turntable and the inner shell outside the through hole. The cloth bag is coaxial with the through hole and has the same inner diameter.

[0006] Each second rotating shaft has a slider located inside the inner housing that can slide back and forth along the second rotating shaft. Each second rotating shaft has a disk located between the inner housing and the outer housing that can slide back and forth along the second rotating shaft. Multiple support rods are fixed between the disk and the slider. When the first rotating shaft rotates, the sliders located on the front and rear sides of the first rotating shaft can move back and forth along the second rotating shaft. When the sliders move back and forth along the second rotating shaft, the second rotating shaft can rotate around its axis.

[0007] A cam is fixed on the first rotating shaft between every two sleeves, and a vertical plate is fixed between every two sliders on the same side. A compression spring connects the vertical plate to the inner housing, and the cam is always in contact with the vertical plates on the front and rear sides.

[0008] Each slider has a circular hole in the middle that passes through the front and rear ends of the slider. The slider is fitted onto the outer edge of the second rotating shaft through the circular hole. Each second rotating shaft has a threaded groove with a large lead in the part located inside the inner housing. A protrusion is fixed on the inner side of the circular hole of each slider and is placed in the threaded groove.

[0009] The right end of the first rotating shaft passes through the right end face of the inner shell and the outer shell. A motor is fixed to the right end of the outer shell, and the motor shaft is coaxially and fixedly connected to the first rotating shaft.

[0010] The outer diameter of the disc is equal to the inner diameter of the through hole. The outer side of the support rod is flush with the outer edge of the disc. When the support rod is located inside the bag, it can support the bag. The end of the disc away from the support rod is rounded.

[0011] A funnel-shaped receiving hopper is fixedly connected to the opening at the lower end of the outer shell. Four vertically placed support legs are evenly distributed along the circumference at the lower end of the outer shell, and the height of the support legs is greater than the height of the receiving hopper.

[0012] Each slider has multiple air holes evenly distributed along its circumference, penetrating the front and rear end faces.

[0013] The turntable has a clearance hole in the middle, the second rotating shaft passes through the clearance hole, a guide block is fixed on the inner side of the clearance hole, and a clearance groove is opened at the upper end of the second rotating shaft. The guide block is placed in the clearance groove and can move up and down along the clearance groove.

[0014] This invention uses a motor to drive the front and rear bags to twist alternately, unscrewing off the clumps without affecting normal gas filtration, thus greatly improving dust removal efficiency. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention.

[0016] Figure 2 This is a top sectional view of the present invention.

[0017] Figure 3 This is a front sectional view of the outer shell and inner shell of the present invention.

[0018] Figure 4 This is a three-dimensional part drawing of the slider, support rod, and disk of the present invention.

[0019] Figure 5 This is the front view of the turntable of the present invention.

[0020] Figure 6 This is a cross-sectional view showing the connection relationship between the turntable and the second rotating shaft of the present invention. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Depend on Figures 1 to 6 The present invention includes an outer shell 1, which is a rectangular shell with an opening at the lower end. An air inlet 2 is provided at the left end of the outer shell 1. A rectangular inner shell 3 is located in the middle of the outer shell 1. An air outlet pipe 4, communicating with the cavity of the inner shell 3, is fixed to the upper end of the inner shell 3. The upper end of the air outlet pipe 4 passes through the outer shell 1. A first rotating shaft 5, horizontally placed left and right, is located within the cavity of the inner shell 1. The first rotating shaft 5 can rotate freely around its axis. Multiple bushings 6 are fitted onto the first rotating shaft 5 along its axis, and the bushings 6 are rotatably connected to the first rotating shaft 5. A through hole 7 is provided on the front and rear end faces of the inner shell 3 at the projection positions of all bushings 6. Each through hole 7 contains a second rotating shaft 8, horizontally placed front and rear. The ends of the second rotating shafts 8 are rotatably connected to the corresponding side of the outer shell 1 and the bushing 6. Each second rotating shaft 8 has a turntable 9 at the end closest to the outer shell 1. The turntable 9 can move along the axis of the second rotating shaft 8 and can rotate with the second rotating shaft 8. Each turntable 9 and the inner housing 3 are fixedly connected to a cylindrical cloth bag 10 outside the through hole 7. The cloth bag 10 is coaxial with the through hole 7 and has the same inner diameter.

[0023] Each second rotating shaft 8 has a slider 11 located inside the inner housing 3 that can slide back and forth along the second rotating shaft 8. Each second rotating shaft 8 has a disk 12 located between the inner housing 3 and the outer housing 1 that can slide back and forth along the second rotating shaft 8. Multiple support rods 13 are fixed between the disk 12 and the slider 11. When the first rotating shaft 5 rotates, the sliders 11 located on the front and rear sides of the first rotating shaft 5 can move back and forth along the second rotating shaft 8. When the sliders 11 move back and forth along the second rotating shaft 8, the second rotating shaft 8 can rotate around its axis.

[0024] A cam 14 is fixed on the first rotating shaft 5 between every two sleeves 6, and a vertical plate 15 is fixed between every two sliders 11 on the same side. A compression spring is connected between the vertical plate 15 and the inner housing 3. The cam 14 is always in contact with the vertical plates 15 on the front and rear sides.

[0025] Each slider 11 has a circular hole in the middle that passes through the front and rear ends of the slider 11. The slider 11 is fitted onto the outer edge of the second rotating shaft 8 through the circular hole. The portion of the second rotating shaft 8 located inside the inner housing 3 has a threaded groove 16 with a large lead. A protrusion 21 is fixed on the inner side of the circular hole of each slider 11. The protrusion 21 is placed in the threaded groove 16.

[0026] The right end of the first rotating shaft 5 passes through the right end face of the inner shell 3 and the outer shell 1. A motor 17 is fixed to the right end of the outer shell 1, and the rotating shaft of the motor 17 is coaxially and fixedly connected to the first rotating shaft 5.

[0027] The outer diameter of the disc 12 is equal to the inner diameter of the through hole 7. The outer side of the support rod 13 is flush with the outer edge of the disc 12. When the support rod 13 is located inside the bag 10, it can support the bag 10. The end of the disc 12 away from the support rod 13 is rounded.

[0028] A funnel-shaped receiving hopper 18 is fixedly connected to the lower opening of the outer shell 1. Four vertically placed support legs 19 are evenly distributed along the circumference of the lower end of the outer shell 1, and the height of the support legs 19 is greater than the height of the receiving hopper 18.

[0029] Each slider 11 has multiple air holes 20 evenly distributed along its circumference, penetrating the front and rear end faces.

[0030] The turntable 9 has a clearance hole 22 in the middle, the second rotating shaft 8 passes through the clearance hole 22, a guide block 23 is fixed on the inner side of the clearance hole 22, and a clearance groove 24 is opened at the upper end of the second rotating shaft 8. The guide block 23 is placed in the clearance groove 24 and can move up and down along the clearance groove.

[0031] It is worth mentioning that the first rotating shaft 5 is rotatably connected to the outer shell 1 and the inner shell 3 at both ends through bearings, and the second rotating shaft 8 is rotatably connected to the outer shell 1 and the bushing 6 through bearings, and the bushing 6 is rotatably connected to the first rotating shaft 5 through bearings.

[0032] The lower opening of the outer shell 1 is funnel-shaped, through which the fertilizer clumps that have been cleaned off can be discharged from the shell 1.

[0033] In use, the air inlet 2 is first connected to the exhaust port of the fertilizer dryer, and the exhaust pipe 4 is connected to the exhaust fan. The airflow enters the outer shell 1 cavity through the air inlet 2, is filtered by the cloth bag 10, and then enters the inner shell 3 cavity through the through hole 7. It is then discharged through the exhaust pipe 4. The entire filtration process takes place on the outer edge of the cloth bag 10, so fertilizer clumps of different sizes will form on the outer edge of the cloth bag 10. The motor 17 drives the first rotating shaft 5 to rotate. The first rotating shaft 5 drives the vertical plates 15 on the front and rear sides to move back and forth through the cam 14. When the vertical plates 15 move back and forth, they can drive the slider 11, the support rod 13, and the disc 12 to move along the axis of the second rotating shaft 8. When the slider 11 moves back and forth, it can drive the second rotating shaft 8 to rotate through the cooperation of the protrusion 21 and the threaded groove 16. When the disc 12 and the support rod 13 move away from the end of the rotating disk 9, the support rod 13 gradually loses its position. The support function of the cloth bag 10 is that since the upper end of the cloth bag 10 is fixed to the turntable 9 and the lower end is fixed to the inner shell 3 and cannot be twisted, the rotation of the turntable 9 can twist and deform the cloth bag 10 as a whole until the vertical plate 15 moves to the near rest point of the cam 14. During the deformation of the cloth bag 10, the fertilizer clumps on its outer edge surface will be squeezed, rubbed and fall off. When the disc 12 and the support rod 13 move towards one end of the turntable 9, the turntable 9 reverses and drives the twisted cloth bag 10 to reset. The disc 12 can open and expand the cloth bag again from the inside to the outside. The reset process of the cloth bag 10 can give the fertilizer clumps another twisting force, causing them to fall off, until the disc 12 moves to the outermost end and opens the cloth bag 10 back into a cylindrical shape, thus completing one clump cleaning. Since the motor 17 drives the first rotating shaft 5 and the cam 14 to rotate continuously, the cloth bags 10 on the front and rear sides repeat the above clump cleaning process.

[0034] This invention uses the rotation of the first rotating shaft 5 to drive the cam 15 to rotate, causing all the support rods 13 and the disc 12 on the same side to disengage from the bag 10, thus loosening the bag 10. At the same time, the large lead thread engagement between the slider 11 and the second rotating shaft 8 causes the turntable 9 to rotate the bag 10, causing the bag 10 to twist as a whole. When the disc 12 moves towards the side closer to the turntable 9, it can open and reset the bag 10 from the inside out through the outer edge surface, so that the bag 10 is subjected to an outward stretching force again. The overall twisting and reset of the bag 10 can produce large deformation and compression at any position on the bag 10, making it easier to squeeze out fertilizer clumps. This can effectively prevent the bag 10 from being clogged by fertilizer clumps and greatly improve the filtration efficiency of the bag 10.

[0035] The present invention utilizes the turntable 9 to cooperate with the second rotating shaft 8 through the guide block 23 and the relief groove 24, so that the turntable 9 can rotate with the second rotating shaft 8 and move axially along the second rotating shaft 8 at the same time, so that when the cloth bag 10 is twisted, it pulls the turntable 9 to move closer to the inner shell 3, preventing the cloth bag 10 from being torn due to excessive force in the length direction after being twisted.

[0036] The cam 14 drives the two sets of filter bags 10 to be twisted and reset alternately, ensuring that one side of the filter bag 10 is always in the unfolded state for normal filtration, so that cleaning of clumps and filtration can be carried out at the same time, ensuring the continuity of filtration.

Claims

1. An anti-caking cloth bag dust collector comprising an outer housing (1), characterized in that, The outer shell (1) is a rectangular shell with an open lower end, the left end of the outer shell (1) is provided with an air inlet hole (2), the middle of the outer shell (1) is provided with a rectangular inner shell (3), the upper end of the inner shell (3) is fixedly provided with an air outlet pipe (4) in communication with the cavity of the inner shell (3), the upper end of the air outlet pipe (4) penetrates the outer shell (1), the cavity of the inner shell (1) is provided with a first rotating shaft (5) horizontally placed left and right, the first rotating shaft (5) can freely rotate around the axis, a plurality of shaft sleeves (6) are sleeved on the first rotating shaft (5) along the axis direction, the shaft sleeves (6) are rotatably connected with the first rotating shaft (5), the front and rear end faces of the inner shell (3) are provided with a through hole (7) at the projection position of all shaft sleeves (6), each through hole (7) is provided with a second rotating shaft (8) horizontally placed front and rear, the ends of the second rotating shaft (8) are rotatably connected with the corresponding side outer shell (1) and the shaft sleeve (6), respectively, each second rotating shaft (8) is provided with a rotating disc (9) at the end close to the outer shell (1), the rotating disc (9) can move along the axis of the second rotating shaft (8) and rotate with the second rotating shaft (8), each rotating disc (9) is fixedly connected with a cylindrical cloth bag (10) between the inner shell (3) and outside the through hole (7), the cloth bag (10) is coaxial with the through hole (7) and has the same inner diameter; Each second rotating shaft (8) is provided with a sliding block (11) that can slide forward and backward along the second rotating shaft (8) in the inner shell (3), each second rotating shaft (8) is provided with a disc (12) that can slide forward and backward along the second rotating shaft (8) between the inner shell (3) and the outer shell (1), a plurality of supporting rods (13) are fixedly connected between the disc (12) and the sliding block (11), when the first rotating shaft (5) rotates, the sliding blocks (11) on the left and right sides of the first rotating shaft (5) can reciprocate forward and backward along the second rotating shaft (8), when the sliding blocks (11) reciprocate forward and backward along the second rotating shaft (8), the second rotating shaft (8) can rotate around the axis; The first rotating shaft (5) is fixedly provided with a cam (14) between each two sleeves (6), each two sliding blocks (11) on the same side are fixedly provided with a vertical plate (15), a compression spring is connected between the vertical plate (15) and the inner shell (3), the cam (14) is always in contact with the vertical plates (15) on the left and right sides; Each sliding block (11) is provided with a circular hole penetrating the front and rear end faces of the sliding block (11) in the middle, the sliding block (11) is sleeved on the outer edge surface of the second rotating shaft (8) through the circular hole, each second rotating shaft (8) is provided with a large lead thread groove (16) in the part inside the inner shell (3), each sliding block (11) is fixedly provided with a protrusion (21) on the inner side of the circular hole, the protrusion (21) is arranged in the thread groove (16).

2. The anti-caking cloth bag precipitator according to claim 1, wherein The right end of the first rotating shaft (5) penetrates the right end face of the inner shell (3) and the outer shell (1), the right end of the outer shell (1) is fixedly provided with a motor (17), the rotating shaft of the motor (17) is fixedly connected with the first rotating shaft (5) coaxially.

3. The anti-caking cloth bag precipitator according to claim 1, wherein The disc (12) has an outer diameter equal to the inner diameter of the through hole (7), and the outer side of the support rod (13) is flush with the outer edge of the disc (12), so that the cloth bag (10) can be supported when the support rod (13) is located inside the cloth bag (10), and the end of the disc (12) away from the support rod (13) is rounded.

4. The anti-caking cloth bag precipitator according to claim 1, wherein The outer shell (1) is fixedly connected with a funnel-shaped receiving hopper (18) at the opening position of the lower end, and the lower end of the outer shell (1) is circumferentially and uniformly provided with four vertically placed supporting legs (19), and the height of the supporting legs (19) is greater than the height of the receiving hopper (18).

5. The anti-caking cloth bag precipitator according to claim 1, wherein A plurality of air holes (20) are uniformly and circumferentially arranged on each sliding block (11) and extend through the front and rear end faces.

6. The anti-caking cloth bag precipitator according to claim 1, wherein The rotating disc (9) is provided with a clearance hole (22) in the middle, the second rotating shaft (8) penetrates through the clearance hole (22), the inner side of the clearance hole (22) is fixedly provided with a lead block (23), the upper end of the second rotating shaft (8) is provided with a clearance groove (24), and the lead block (23) is arranged in the clearance groove (24) and can move up and down along the clearance groove.

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