A dust removal device capable of automatically cleaning filter screen

Abstract

The present invention provides a dust removal device capable of automatically cleaning a filter screen, and belongs to the technical field of environmental protection equipment. The device comprises an air intake duct, an air outlet duct, and a filter screen located between the air intake duct and the air outlet duct, a dust wind shield having a notch facing one side of the filter screen, a dust collecting rod fixedly arranged in the dust wind shield, two spiral dust-repelling sheets respectively located on both sides of the midpoint of the dust collecting rod are rotatably connected to the dust collecting rod, the dust-repelling sheets are rotatably connected to the inner wall of the dust wind shield, the outer end of the dust collecting rod has a gear, the air outlet duct has a gear ring matched with the gear, a plurality of corona rods are arranged in the dust wind shield, the corona rods are connected to the negative pole of a high-voltage power supply, and the dust collecting rods are connected to the positive pole of the high-voltage power supply; the two ends of the dust wind shield respectively have a slag discharge port, the dust wind shield is connected by a driving mechanism for driving the dust wind shield to rotate, and the spiral directions of the two dust-repelling sheets are opposite. The present invention has the advantages of being able to realize maintenance-free of the filter screen, and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection equipment and relates to a dust removal device capable of automatically cleaning a filter screen. Background Art

[0002] Dust removal equipment is a commonly used environmental protection equipment in industrial and mining enterprises. When filter filtration is used for dust removal, in order to improve the filtration efficiency, the filter hole diameter of the filter should not be too small during one-time dust removal, otherwise it will greatly shorten the maintenance cycle. Instead, multi-stage filtration is used to filter out dust of different particle sizes one by one. This method makes the structure more complicated, and the maintenance of the filter involves the disassembly, assembly and cleaning of the equipment, which affects the continuous operation of the equipment and has high labor costs.

[0003] When the filter screen filters solid particles in the exhaust gas, the particles are easily blocked by the air pressure. Although it is periodically maintained and cleaned, it will seriously affect the filtration efficiency and quality. The simultaneous cleaning of the filter screen and other filter media to achieve the purpose of maintenance-free has always been the research direction and difficulty in the industry. Summary of the invention

[0004] The purpose of the present invention is to provide a dust removal device capable of automatically cleaning the filter screen in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to achieve maintenance-free filter screen.

[0005] The object of the present invention can be achieved through the following technical solutions: a dust removal device capable of automatically cleaning a filter screen, characterized in that it comprises an inlet air duct, an outlet air duct and a filter screen located between the inlet air duct and the outlet air duct, the filter screen is installed on the inner wall at the inlet of the outlet air duct, the inlet air duct and the outlet air duct are detachably connected, a sleeve is rotatably connected at the outlet of the inlet air duct, a strip-shaped dust wind shield is fixedly provided on the sleeve, the dust wind shield has a notch facing one side of the filter screen, a dust collecting rod is fixedly provided in the dust wind shield, and the dust collecting rod Two spiral dust-repelling sheets are rotatably connected to the dust rod and are respectively located on both sides of the midpoint of the dust collecting rod. The dust-repelling sheets are rotatably connected to the inner wall of the dust wind shield. The outer end of the dust collecting rod is provided with a gear, and the air outlet duct is provided with a gear ring that cooperates with the gear. A plurality of corona rods are arranged in the dust wind shield, and the corona rods are connected to the negative pole of a high-voltage power supply, and the dust collecting rods are connected to the positive pole of the high-voltage power supply; two ends of the dust wind shield are respectively provided with a slag discharge port, and the dust wind shield is connected by a driving mechanism that drives the dust wind shield to rotate, and the spiral directions of the two dust-repelling sheets are opposite.

[0006] Furthermore, the driving mechanism includes a rotating shaft fixed on the dust and wind shield, the rotating shaft is fixedly provided with an impeller located in the air outlet duct, and the center of the filter screen has a through hole to avoid the rotating shaft.

[0007] As another option, the driving mechanism includes a rotating shaft fixed on the dust and wind shield, and the rotating shaft is connected to an output shaft of a driving motor.

[0008] As another option, the driving mechanism includes a rotating shaft fixed on the dust and wind shield, and an impeller located in the air outlet duct is fixed on the rotating shaft. The center of the filter has a through hole to avoid the rotating shaft. The rotating shaft is connected to the output shaft of a driving motor. The rotation of the impeller can increase the pressure of the exhaust gas passing through the filter.

[0009] Furthermore, two arc-shaped shielding strips are fixedly provided on the dust shield, and the two shielding strips are respectively located on both sides of the dust shield. The shielding strips are used to cover the avoidance gap between the air inlet duct and the air outlet duct due to the existence of the dust shield.

[0010] Furthermore, the collar is connected to the outer wall surface of the air intake duct via a bearing.

[0011] Furthermore, a plurality of rotating drums are rotatably connected to the dust collecting rod, the rotating drums are fixedly connected to the dust driving sheet, and the rotating drums are rotatably connected to the inner wall of the dust collecting wind shield.

[0012] Furthermore, the outer wall of the air inlet duct has a mounting ring 1, and the outer wall of the air outlet duct has a mounting ring 2, a plurality of bolts are fixedly provided on the mounting ring 2, a plurality of mounting holes corresponding to the bolts are opened on the mounting ring 1, and locking nuts are threadedly connected to the bolts.

[0013] Furthermore, there are two corona rods, which are respectively located on both sides of the dust collecting rod, and the corona rods are close to the filter screen.

[0014] When the exhaust gas passes through the filter, dust accumulates on the air inlet side of the filter. Due to the rotation of the dust shield, the spiral dust-repelling sheet also rotates on the dust collecting rod, so that the dust adhered to the dust collecting rod moves toward the slag discharge port on the dust shield under the driving action of the dust-repelling sheet, and the dust is finally discharged.

[0015] The rotation of the dust shield can cover the entire side of the air inlet side of the filter. If the dust shield continues to rotate at a certain speed, the filter can always be in a like-new condition, achieving maintenance-free operation and automatic slag discharge.

[0016] Electrostatic dust collection structure: The positive pole of the high-voltage power supply is connected to the dust collecting rod, and the corona rods on both sides are connected to the negative pole of the high-voltage power supply, forming a discharge area between the corona rod and the dust collecting rod. This area is located on the air inlet side of the filter and between the two corona rods on both sides of the dust collecting rod, so that dust can be adsorbed by the dust collecting rod.

[0017] The rotation speed of the spiral dust-repelling sheet is several times that of the dust-proof wind shield, so that the high-speed rotating dust-repelling sheet can form a dust-guiding airflow from the inside to the outside in the dust-proof wind shield. This airflow can drive the dust particles that cannot be adsorbed to the side of the slag discharge port for discharge. In other words, this device can collect and clean all types of particles of a certain particle size.

[0018] An impeller is arranged on the rotating shaft and is located in the outlet air duct. In the case where a driving motor is not arranged, the airflow can be fully utilized. The airflow drives the impeller to rotate, and the rotation of the impeller drives the rotating shaft to rotate. Although it has a negative impact on the circulation speed of the airflow, it can fully utilize the exhaust gas and avoid the installation of driving motors and other equipment to cause new dust removal burdens. The impeller is arranged in the outlet air duct, and the gas in this area is filtered gas, which greatly reduces the fouling during the rotation of the impeller.

[0019] The driving motor is arranged in such a way that the rotation speed of the dust wind shield can be controlled, thereby making the airflow dust removal effect more obvious and more controllable.

[0020] The driving motor and the impeller are arranged in such a way that the impeller driven by the driving motor can form a negative pressure in the air outlet duct, so that the exhaust gas can pass through the filter more efficiently, thereby improving the filtration efficiency. With the dust shield and the dust collecting rod, the maximum flow efficiency can ensure the filtration quality.

[0021] Although the shielding strip fixedly installed on the dust shield cannot achieve sealing between the air inlet air duct and the air outlet air duct, since the air flow direction is axial, shielding strips are set at the gap to reduce the ventilation cross-section to ensure that not much exhaust gas is discharged from the gap. Plane bearings can also be set to achieve sealing in this area, that is, planar bearings connected to the air inlet air duct and the air outlet air duct are respectively set on both sides of the shielding strip, and the thickness of the shielding strip is consistent with that of the dust shield.

[0022] The detachable connection structure provided between the air inlet duct and the air outlet duct can facilitate the disassembly and assembly of the filter and the dust wind shield, and can also adjust the meshing depth of the gear and the gear ring, thereby adjusting the gap between the dust wind shield and the filter.

[0023] As an adaptive setting, the dust wind shield, air inlet duct, air outlet duct, filter, etc. are all made of insulating materials. The principle of the electrostatic dust removal mechanism is a prior art, and only its outline connection method is disclosed above, and the brushes required for the external high-voltage power supply, the rectification and transformation required for the high-voltage power supply and other structures are not elaborated. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the dust removal device.

[0025] Figure 2It is a schematic diagram of the structure of the dust wind shield, the collar and the shielding strip.

[0026] Figure 3 It is a cross-sectional view of the dust wind shield.

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the exhaust airway.

[0028] In the figure, 1. air inlet duct; 11. collar; 2. air outlet duct; 3. filter; 4. dust shield; 41. notch; 42. dust collecting rod; 43. dust repelling sheet; 44. gear; 45. gear ring; 46. corona rod; 47. slag discharge port; 48. shielding strip; 5. rotating shaft; 51. impeller; 61. mounting ring 1; 62. mounting ring 2; 63. bolt. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] like Figure 1 to Figure 4 As shown, it includes an air intake duct 1, an air outlet duct 2 and a filter 3 located between the air intake duct 1 and the air outlet duct 2, the filter 3 is installed on the inner wall at the entrance of the air outlet duct 2, the air intake duct 1 and the air outlet duct 2 are detachably connected, a sleeve 11 is rotatably connected at the outlet of the air intake duct 1, a strip-shaped dust wind shield 4 is fixedly arranged on the sleeve 11, the dust wind shield 4 has a notch 41 facing the side of the filter 3, a dust collecting rod 42 is fixedly arranged in the dust wind shield 4, and the dust collecting rod 42 is rotatably connected to two pieces respectively located in the dust collecting rod 42 Spiral dust-repelling sheets 43 are arranged on both sides of the point, and the dust-repelling sheets 43 are rotatably connected to the inner wall of the dust-proof wind shield 4. The outer end of the dust collecting rod 42 has a gear 44, and the air outlet duct 2 has a gear ring 45 that cooperates with the gear 44. A plurality of corona rods 46 are arranged in the dust-proof wind shield 4, and the corona rods 46 are connected to the negative pole of a high-voltage power supply, and the dust collecting rod 42 is connected to the positive pole of the high-voltage power supply; a slag discharge port 47 is respectively provided at both ends of the dust-proof wind shield 4, and the dust-proof wind shield 4 is connected by a driving mechanism that drives the dust-proof wind shield 4 to rotate, and the spiral directions of the two dust-repelling sheets 43 are opposite.

[0031] The driving mechanism comprises a rotating shaft 5 fixed on the dust and wind shield 4 , on which an impeller 51 located in the air outlet duct 2 is fixedly arranged, and the center of the filter screen 3 has a through hole for avoiding the rotating shaft 5 .

[0032] Two arc-shaped shielding strips 48 are fixedly provided on the dust and wind shield 4, and the two shielding strips 48 are respectively located on both sides of the dust and wind shield 4. The shielding strips 48 are used to cover the avoidance gap between the air inlet duct 1 and the air outlet duct 2 due to the existence of the dust and wind shield 4.

[0033] The collar 11 is connected to the outer wall surface of the intake air duct 1 via a bearing.

[0034] A plurality of rotating drums are rotatably connected to the dust collecting rod 42 , and the rotating drums are fixedly connected to the dust driving sheet 43 , and the rotating drums are rotatably connected to the inner wall of the dust collecting windproof cover 4 .

[0035] The outer wall of the intake air duct 1 has a mounting ring 1 61, and the outer wall of the outlet air duct 2 has a mounting ring 2 62. A plurality of bolts 63 are fixedly arranged on the mounting ring 2 62. The mounting ring 1 61 is provided with a plurality of mounting holes corresponding to the bolts 63 one by one, and the bolts 63 are threadedly connected with locking nuts.

[0036] There are two corona rods 46 , which are respectively located on both sides of the dust collecting rod 42 , and the corona rods 46 are close to the filter screen 3 .

[0037] When the exhaust gas passes through the filter 3, dust accumulates on the air inlet side of the filter 3. Due to the rotation of the dust shield 4, the spiral dust-repelling sheet 43 also rotates on the dust collecting rod 42, so that the dust adhered to the dust collecting rod 42 moves toward the slag discharge port 47 on the dust shield 4 under the driving action of the dust-repelling sheet 43, and the dust is finally discharged.

[0038] The rotation of the dust wind shield 4 can cover the entire side of the air inlet side of the filter 3. If the dust wind shield 4 continues to rotate at a certain speed, the filter 3 can always be in a like-new state, maintenance-free, and automatic slag discharge.

[0039] Electrostatic dust suction structure: The positive electrode of the high-voltage power supply is connected to the dust collecting rod 42, and the corona rods 46 on both sides are connected to the negative electrode of the high-voltage power supply, forming a discharge area between the corona rod 46 and the dust collecting rod 42. This area is located on the air inlet side of the filter 3 and between the two corona rods 46 on both sides of the dust collecting rod 42, so that dust can be adsorbed by the dust collecting rod 42.

[0040] The rotation speed of the spiral dust-repelling sheet 43 is several times that of the dust-proof wind shield 4, so that the high-speed rotating dust-repelling sheet 43 can form a dust-guiding airflow from the inside to the outside in the dust-proof wind shield 4, and this airflow can drive the dust particles that cannot be adsorbed to the side of the slag discharge port 47 for discharge. In other words, this device can collect and clean all types of particles of a certain particle size.

[0041] An impeller 51 is arranged on the rotating shaft 5, and the impeller 51 is located in the outlet air duct 2. In the case where a driving motor is not arranged, the airflow can be fully utilized, and the impeller 51 is driven to rotate under the action of the airflow, and the rotation of the impeller 51 drives the rotating shaft 5 to rotate. Although it has a negative impact on the circulation speed of the airflow, it can make full use of the exhaust gas and avoid setting up a driving motor and other equipment to cause a new dust removal burden. The impeller 51 is arranged in the outlet air duct 2, and the gas in this area is filtered gas, which greatly reduces the fouling during the rotation of the impeller 51.

[0042] The driving motor is arranged in such a way that the rotation speed of the dust wind shield 4 can be controlled, thereby making the airflow dust removal effect more obvious and more controllable.

[0043] The driving motor and the impeller 51 are arranged in such a way that the impeller 51 driven by the driving motor can form a negative pressure in the air outlet duct 2, so that the exhaust gas can pass through the filter 3 more efficiently, thereby improving the filtration efficiency. With the dust wind shield 4 and the dust collecting rod 42, a larger flow efficiency can ensure the filtration quality.

[0044] Although the shielding strip 48 fixedly arranged on the dust and wind shield 4 cannot achieve sealing between the air inlet duct 1 and the air outlet duct 2, since the air flow direction is in the axial direction, the shielding strip 48 is arranged at the gap to reduce the ventilation cross-section to ensure that not much exhaust gas is discharged from the gap, and a plane bearing can also be arranged to achieve sealing in this area, that is, plane bearings connected to the air inlet duct 1 and the air outlet duct 2 are respectively arranged on both sides of the shielding strip 48, and the thickness of the shielding strip 48 is consistent with that of the dust and wind shield 4.

[0045] The detachable connection structure provided between the air inlet duct 1 and the air outlet duct 2 can facilitate the disassembly and assembly of the filter 3 and the dust wind shield 4, and can also adjust the meshing depth between the gear 44 and the gear ring 45, thereby adjusting the gap between the dust wind shield 4 and the filter 3.

[0046] As an adaptive setting, the dust wind shield 4, the air inlet duct 1, the air outlet duct 2, the filter 3, etc. are all made of insulating materials. The principle of the electrostatic dust removal mechanism is a prior art, and only its outline connection method is disclosed above, and the brushes required for the external high-voltage power supply, the rectification and transformation required for the high-voltage power supply, and other structures are not elaborated.

[0047] As another embodiment, the driving mechanism includes a rotating shaft 5 fixed on the dust and wind shield 4, and the rotating shaft 5 is connected to an output shaft of a driving motor.

[0048] As another embodiment, the driving mechanism includes a rotating shaft 5 fixed on the dust and wind shield 4, and an impeller 51 located in the air outlet duct 2 is fixed on the rotating shaft 5. The center of the filter 3 has a through hole for avoiding the rotating shaft 5. The rotating shaft 5 is connected to the output shaft of a driving motor. The rotation of the impeller 51 can increase the pressure of the exhaust gas passing through the filter 3.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A dust removal device capable of automatically cleaning a filter screen, characterized in that: The invention comprises an air intake duct (1), an air outlet duct (2), and a filter screen (3) located between the air intake duct (1) and the air outlet duct (2), wherein the filter screen (3) is installed on the inner wall at the entrance of the air outlet duct (2), the air intake duct (1) and the air outlet duct (2) are detachably connected, a sleeve (11) is rotatably connected to the outlet of the air intake duct (1), and a strip-shaped dust and wind shield (4) is fixedly arranged on the sleeve (11). ), the dust wind shield (4) has a notch (41) facing the filter screen (3), a dust collecting rod (42) is fixedly arranged inside the dust wind shield (4), two spiral dust driving pieces (43) are rotatably connected to the dust collecting rod (42) and are respectively located on both sides of the midpoint of the dust collecting rod (42), the dust driving pieces (43) are rotatably connected to the inner wall of the dust wind shield (4), the outer end of the dust collecting rod (42) has a gear (44), the outlet The air guide pipe (2) has a gear ring (45) that cooperates with the gear (44); a plurality of corona rods (46) are arranged in the dust wind shield (4); the corona rods (46) are connected to the negative electrode of a high-voltage power supply; the dust collecting rod (42) is connected to the positive electrode of the high-voltage power supply; both ends of the dust wind shield (4) have a slag discharge port (47); the dust wind shield (4) is connected via a driving mechanism that drives the dust wind shield (4) to rotate. The spiral directions of the two dust-repelling sheets (43) are opposite; two arc-shaped shielding strips (48) are fixedly provided on the dust-accumulating wind shield (4); the two shielding strips (48) are respectively located on two sides of the dust-accumulating wind shield (4); the shielding strips (48) are used to cover the avoidance gap between the air inlet duct (1) and the air outlet duct (2) due to the existence of the dust-accumulating wind shield (4); the collar (11) is connected to the outer wall surface of the air inlet duct (1) via a bearing.

2. A dust removal device capable of automatically cleaning a filter screen according to claim 1, characterized in that: The driving mechanism comprises a rotating shaft (5) fixed on the dust and wind shield (4), an impeller (51) located in the air outlet duct (2) being fixedly arranged on the rotating shaft (5), and a through hole is provided at the center of the filter screen (3) to avoid the rotating shaft (5).

3. A dust removal device capable of automatically cleaning a filter screen according to claim 1, characterized in that: The driving mechanism comprises a rotating shaft (5) fixed on the dust and wind shield (4), and the rotating shaft (5) is connected to an output shaft of a driving motor.

4. A dust removal device capable of automatically cleaning a filter screen according to claim 1, characterized in that: The driving mechanism comprises a rotating shaft (5) fixed on the dust and wind shield (4); an impeller (51) located in the air outlet duct (2) is fixedly arranged on the rotating shaft (5); a through hole for avoiding the rotating shaft (5) is provided at the center of the filter (3); the rotating shaft (5) is connected to an output shaft of a driving motor; the rotation of the impeller (51) can increase the pressure of the exhaust gas passing through the filter (3).

5. A dust removal device capable of automatically cleaning a filter screen according to claim 1, 2, 3 or 4, characterized in that: A plurality of rotating drums are rotatably connected to the dust collecting rod (42), the rotating drums are fixedly connected to the dust driving sheet (43), and the rotating drums are rotatably connected to the inner wall of the dust collecting windproof cover (4).

6. A dust removal device capable of automatically cleaning a filter screen according to claim 1, 2, 3 or 4, characterized in that: The outer wall of the air inlet duct (1) has a first mounting ring (61), and the outer wall of the air outlet duct (2) has a second mounting ring (62). A plurality of bolts (63) are fixedly arranged on the second mounting ring (62). A plurality of mounting holes corresponding to the bolts (63) are formed on the first mounting ring (61), and locking nuts are threadedly connected to the bolts (63).

7. A dust removal device capable of automatically cleaning a filter screen according to claim 1, 2, 3 or 4, characterized in that: There are two corona rods (46), which are respectively located on both sides of the dust collecting rod (42), and the corona rods (46) are close to the filter screen (3).

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