Top outer side mechanical rapping type electric dust remover

Abstract

The invention discloses a top outer side mechanical rapping type electric dust remover which comprises a dust collecting plate, a mechanical rapping mechanism, a rapping rod, a filling mechanism and a suspension mechanism, and the dust collecting plate can be arranged in an inlet end socket in a limited amplitude shaking mode through the suspension mechanism; one end of the rapping rod is mechanically rapped by the mechanical rapping mechanism outside the inlet seal head, the other end of the rapping rod extends into the inlet seal head and transmits mechanical rapping force to the dust collection plate, the packing mechanism is sealed between the inlet seal head and the rapping rod, the space utilization rate is high, the dust removal effect is good, the service life is long, and maintenance is convenient.

Description

Technical Field

[0001] This invention relates to the technical field of electrostatic precipitators, and particularly to the technical field of mechanically vibrating electrostatic precipitators. Background Technology

[0002] Electrostatic precipitators (ESPs) are one of the mainstream equipment for dust removal from industrial flue gas, possessing advantages such as high dust removal efficiency, low flue gas resistance, and large flue gas handling capacity. Traditional ESPs typically only have cathode wires and anode plates within the electric field to separate dust from dust-laden gas using electricity. However, this design not only wastes inlet space but also fails to achieve the target dust removal effect under high dust concentration conditions. Based on this, an ultra-low emission ESP with publication number CN114798175A adds a pre-dust removal and flow equalization device inside the inlet horn. However, because this ESP does not equip the pre-dust removal and flow equalization device with a rapping device, the ESP is prone to increased system resistance and reduced dust removal efficiency due to dust accumulation in the pre-dust removal and flow equalization device.

[0003] Currently, the mainstream rapping solutions for electrostatic precipitators are side-mounted mechanical rapping and top-mounted electromagnetic rapping. Side-mounted mechanical rapping typically places the mechanical rapping components inside the casing. This makes online maintenance of the electrostatic precipitator difficult for workers, and the moving parts of the mechanical rapping components are easily exposed to flue gas dust and corrosive gases (inevitably causing wear and corrosion, affecting the lifespan and operational stability of the mechanical rapping components). Top-mounted electromagnetic rapping, on the other hand, typically places the rapping mechanism outside the casing. However, top-mounted electromagnetic rapping often involves hundreds of rapping points, each requiring a separate control unit, resulting in numerous control points, high costs (generally using DCS for control, with each control point plus cables costing over 2,000 yuan), and difficulties in structural maintenance.

[0004] Prior to 2010, environmental emission standards only required that the concentration of dust at the outlet be controlled within 20–50 mg / m³. 3 Therefore, the traditional imported technology could be used to ensure that the outlet dust concentration met the standards for the rapping device, and at that time, there was almost no need in the industry to measure and evaluate the rapping acceleration. In recent years, with the in-depth promotion of the "ultra-low emission" policy for coal-fired power plants and the implementation of the "ultra-low emission" policy for non-power industries, the outlet dust concentration of electrostatic precipitators is generally required to be 15 mg / m³. 3 The following even proposed 10 mg / m² 3The following requirements apply: Vibration acceleration is a crucial factor affecting the dust removal efficiency of electrostatic precipitators. Insufficient vibration acceleration will result in poor dust removal, while excessive acceleration can easily cause secondary dust generation, damage the equipment, and shorten its lifespan. In other words, vibration acceleration directly affects the dust removal efficiency and service life of electrostatic precipitators. Existing vibration acceleration transmission designs are insufficient to meet the latest environmental protection requirements, necessitating refined improvements to the vibration acceleration transmission design. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art and propose a top-outer mechanical vibration type electrostatic precipitator, which has high space utilization, excellent dust removal effect, long service life and is easy to maintain.

[0006] To achieve the above objectives, the present invention proposes a top-outer-side mechanical rapping electrostatic precipitator, comprising a dust collection plate, a mechanical rapping mechanism, a rapping rod, a packing mechanism, and a suspension mechanism. The dust collection plate is embedded in the inlet head with a limited range of vibration via the suspension mechanism. One end of the rapping rod is mechanically rapped by the mechanical rapping mechanism located outside the inlet head, while the other end extends into the inlet head and transmits the mechanical rapping force to the dust collection plate. The packing mechanism is sealed between the inlet head and the rapping rod.

[0007] Preferably, the inlet end cap is divided into an outer layer and an inner layer from the inlet end to the outlet end, the dust collection plate is located in the inner layer, the dust discharge angle of the inner layer is controlled at 30-35°, and the dust discharge angle of the outer layer is greater than that of the inner layer.

[0008] Preferably, the inner layer is further provided with several reinforcing members at the wall.

[0009] Preferably, the dust collection plate has several dust collection groups, and each dust collection group has several corrugated folded plates. Each dust collection group is configured with at least one vibration point connected to the vibration rod and at least two suspension points connected to the suspension mechanism.

[0010] Preferably, the mechanical rapping mechanism includes a motor, a drive shaft, a bracket, bearings, and rapping hammers. The drive shaft is horizontally arranged above the inlet end cap via several brackets equipped with bearings and is driven to rotate by the motor. Several rapping hammers are arranged sequentially on the drive shaft along the length direction, with an interval of 160° to 200° between adjacent rapping hammers.

[0011] Preferably, the bearing includes a base, rollers, and a bolt. The base has an upward-facing opening into which a drive shaft can be inserted. Several rollers are rotatably connected to the opening. The opening is detachably closed by a bolt.

[0012] Preferably, the vibrating rod passes through the inlet end cap through the rod body, and a vibrating anvil is installed at the exposed end of the rod body. The vibrating hammer includes a first hammer rod, a second hammer rod, and a hammer head. One end of the first hammer rod is detachably connected to the drive shaft, while the other end is hinged to the second hammer rod. The other end of the second hammer rod strikes the vibrating anvil through the hammer head.

[0013] Preferably, the packing mechanism includes a packing sleeve, a clamping flange, seals, and a gasket. The packing sleeve is fixed to the wall of the inlet head, and the rod passes through the inlet head along the packing sleeve. Several seals are jointly sealed between the rod and the packing sleeve by the clamping flange. The gasket is located on the side of the clamping flange facing away from each seal and is sleeved outside the rod.

[0014] Preferably, each of the bearings has an adjusting ring mounted on the drive shaft on each of its opposite sides, and each of the brackets has a baffle that can limit the position of the corresponding adjusting ring.

[0015] Preferably, the suspension mechanism includes a connector, a crossbeam, a top suspension device, a limiting plate, and a bottom suspension device. The upper and lower ends of the dust collection plate are indirectly connected to the crossbeam and the bottom suspension device respectively through the connector. The top suspension device is connected to the inlet end cap and the crossbeam respectively. The bottom suspension device extends into the limiting plate along the limiting groove. The upper end of the dust collection plate is rotatable while the lower end hangs freely.

[0016] The beneficial effects of this invention are: 1) Improved space utilization and synergy between pre-dust removal and main dust removal: This invention, by embedding a dust collection plate in the inlet end cap, can make full use of the buffer space before the industrial flue gas enters the electric field, realize two-stage purification of "pre-dust removal + main dust removal", and effectively improve the total dust removal efficiency of the electrostatic precipitator. 2) Top outer mechanical vibration arrangement for online maintenance and long service life: This invention arranges the mechanical vibration mechanism (including motor, drive shaft and vibration hammer, etc.) on a support platform located outside the inlet head, and then uses the vibration rod that penetrates the inlet head to transmit mechanical vibration force inward. This allows the mechanical vibration mechanism to be completely isolated from the internal flue gas, dust and corrosive gases, avoiding wear and corrosion of its moving parts from the source, effectively extending the service life of its moving parts, and facilitating online maintenance of the mechanical vibration mechanism by maintenance personnel (convenient maintenance). 3) Fewer control points and higher integration, significantly reducing costs: In this invention, the mechanical rapping mechanism adopts the working mode of "one geared motor driving one transmission shaft", and each transmission shaft is equipped with 4 to 8 rapping hammers (adjacent rapping hammers are spaced 160-200° apart), so that one driving point can cover multiple rapping points. Compared with the traditional DCS control design, it can save a lot of control cables and supporting components, and the later maintenance is simple, which can save control costs. 4) Sealing and adaptation design to ensure operational reliability: This invention adds a packing seal design (i.e., multi-layer seal + compression flange) between the inlet end cap and the vibrating rod, which can effectively prevent flue gas leakage without affecting the transmission of mechanical vibration force from the mechanical vibration mechanism to the dust collection plate. 5) Optimized inlet end cap structure to enhance dust removal and structural stability: This invention divides the inlet end cap into inner and outer layers from the inlet end to the outlet end. The inner layer adopts a dust removal angle design of 30-35°, while the outer layer is equipped with a larger flow guiding angle. This allows the dust that is shaken off from the dust collection plate to be quickly guided into the ash hopper, avoiding ash accumulation and blockage (especially suitable for high-concentration dusty flue gas scenarios). In addition, the inner layer is equipped with additional reinforcing components (such as reinforcing angle steel), which can better withstand the additional load of dust collection plate vibration and ash accumulation, effectively improving the overall structural deformation resistance. 6) Precise and efficient transmission of vibration acceleration, adaptable to ultra-low emission requirements: In this invention, the dust collection plate adopts a suspension structure of "rotatable upper end + free hanging lower end" (achieved through top hinged suspension and bottom limiting design), and is indirectly connected to the mechanical vibration mechanism located outside the inlet end cap through the vibration rod, resulting in good overall vibration acceleration transmission; in addition, the group vibration design of the dust collection plate (each dust collection group corresponds to an independent vibration point) can also evenly transmit the vibration force to the entire dust collection surface, thereby avoiding insufficient or overloaded local vibration acceleration.

[0017] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a front view of the mechanically vibrating electrostatic precipitator on the top outer side of the present invention; Figure 2 This is a schematic diagram showing the arrangement of the dust collection plates on the top outer side of the mechanically vibrating electrostatic precipitator of the present invention; Figure 3 This is an assembly diagram of the inlet end cap, dust collection plate, mechanical vibration mechanism, vibration rod, packing mechanism and suspension mechanism of the top outer mechanical vibration type electrostatic precipitator of the present invention; Figure 4 yes Figure 3 An enlarged view of point A; Figure 5 yes Figure 3 An enlarged view of point B; Figure 6 This is a cross-sectional view of the packing mechanism of the mechanically vibrating electrostatic precipitator on the top outer side of the present invention; Figure 7 This is an assembly diagram of the inlet end cap, mechanical rapping mechanism, and rapping rod of the top outer mechanical rapping type electrostatic precipitator of the present invention; Figure 8 This is an assembly diagram of the drive shaft, bearing, adjusting ring, and baffle of the mechanically vibrating electrostatic precipitator on the top outer side of the present invention; Figure 9 This is an assembly diagram of the drive shaft, vibrating hammer, canopy, protective net, and vibrating rod of the mechanically vibrating electrostatic precipitator on the top outer side of the present invention. Figure 10 This is an assembly diagram of the drive shaft and bearings of the mechanically vibrating electrostatic precipitator on the top outer side of the present invention; Figure 11 This is a schematic diagram showing the arrangement of the mechanical rapping mechanism in the top outer mechanical rapping type electrostatic precipitator of the present invention; Figure 12 This is a schematic diagram of the assembly of the inlet end cap and reinforcing member of the mechanically vibrating electrostatic precipitator on the top outer side of the present invention; Figure 13 This is a schematic diagram showing the grouping of the dust collection plates of the mechanically vibrating electrostatic precipitator on the top outer side of the present invention; Figure 14 yes Figure 13 An enlarged schematic diagram of point C.

[0019] In the diagram: 1-Inlet end cap, 11-Inner layer, 12-Outer layer, 2-Dust collection plate, 21-Dust collection group, 22-Vibration point, 23-Hanging point, 3-Mechanical vibration mechanism, 31-Motor, 32-Drive shaft, 33-Bracket, 34-Bearing, 341-Base, 3411-Opening, 342-Roller, 343-Pin, 35-Vibration hammer, 351-First hammer rod, 352-Second hammer rod, 353- Hammer head, 36-adjusting ring, 37-baffle, 38-canopy, 39-protective net, 4-support platform, 5-vibrating rod, 51-rod body, 52-vibrating anvil, 6-filling mechanism, 61-filling sleeve, 62-pressure flange, 63-seal, 64-gasket, 7-suspension mechanism, 71-connector, 72-beam, 73-top suspension device, 74-limiting plate, 75-bottom suspension device, 8-reinforcing component. Detailed Implementation

[0020] See Figures 1 to 14The present invention relates to a top-outer-side mechanical rapping electrostatic precipitator, comprising a dust collection plate 2, a mechanical rapping mechanism 3, a rapping rod 5, a packing mechanism 6, and a suspension mechanism 7. The dust collection plate 2 is internally housed within the inlet head 1 via the suspension mechanism 7, allowing for limited vibration. One end of the rapping rod 5 is mechanically rapped by the mechanical rapping mechanism 3 located outside the inlet head 1, while the other end extends into the inlet head 1 and transmits the mechanical rapping force to the dust collection plate 2. The packing mechanism 6 seals between the inlet head 1 and the rapping rod 5. Specifically, a support platform 4 (e.g., ...) is installed on the top outer side of the inlet head 1. Figure 1 As shown in the figure, the mechanical vibration mechanism 3 is arranged on the support platform 4.

[0021] See Figure 3 The inlet end cap 1 is divided into an outer layer 12 and an inner layer 11 from the inlet end to the outlet end. The dust collection plate 2 is located in the inner layer 11, and the dust discharge angle of the inner layer 11 is controlled at 30-35° (e.g., Figure 5 As shown, i.e., ∠α is 30 to 35°), the dust discharge angle of the outer layer 12 is greater than that of the inner layer 11. This angle design allows the inlet end cap 1 to quickly discharge the dust vibrated down from the dust collection plate 2 into the ash hopper, avoiding the phenomenon of dust accumulation and blockage.

[0022] See Figure 12 The inner layer 11 is also equipped with several reinforcing members 8 at the wall; the reinforcing members 8 can be reinforced angle steel, so that the inlet end cap 1 can be strengthened to meet the load of the dust collection plate 2, the mechanical vibration mechanism 3 and dust, etc., so as to meet the bearing capacity.

[0023] See Figure 13 and Figure 14 The dust collection plate 2 has several dust collection groups 21, and each dust collection group 21 has several corrugated folded plates. Each dust collection group 21 is equipped with at least one vibration point 22 connected to the vibration rod 5 and at least two suspension points 23 connected to the suspension mechanism 7. This grouped dust collection design not only makes it easy for users to flexibly adjust the number of arrangements according to the flue gas flow, but also facilitates partial disassembly and maintenance in the later stage.

[0024] See Figure 7 and Figure 9The mechanical rapping mechanism 3 includes a motor 31, a drive shaft 32, a bracket 33, bearings 34, and rapping hammers 35. The drive shaft 32 is horizontally positioned above the inlet head 1 via several brackets 33 equipped with bearings 34 and is driven to rotate by the motor 31. Several rapping hammers 35 are arranged sequentially along the length of the drive shaft 32, with an interval of 160° to 200° between adjacent rapping hammers 35 (preferably 195° or 165°). The motor 31 is a geared motor, and one geared motor drives 4 to 8 rapping hammers 35. One inlet head 1 is equipped with one geared motor (e.g., Figure 11 (As shown). In addition, the mechanical vibrating mechanism 3 is equipped with a canopy 38 to shield components such as the motor 31, and a protective net 39 to protect maintenance personnel who step onto the support platform 4. In other words, the support platform 4 serves to support the mechanical vibrating mechanism 3 and provide a place for maintenance personnel to temporarily stand. Since all moving parts are located in the directly operable platform area, maintenance personnel do not need to stop the machine and open the inlet end cap 1 during maintenance. They only need to replace or adjust the relevant parts outside the inlet end cap 1, which can greatly shorten the maintenance time.

[0025] See Figure 10 The bearing 34 includes a base 341, rollers 342, and a bolt 343. The base 341 has an upward-facing opening 3411 into which the drive shaft 32 can be inserted. Several rollers 342 are rotatably connected to the opening 3411. The opening 3411 can be detachably closed by the bolt 343. This design allows the drive shaft 32 to be installed and maintained without disassembling the bracket 33 as a whole, making it more suitable for rapid on-site debugging.

[0026] See Figure 4 and Figure 9 The vibrating rod 5 passes through the inlet end cap 1 via the rod body 51. A vibrating anvil 52 is installed at the exposed end of the rod body 51. The vibrating hammer 35 includes a first hammer rod 351, a second hammer rod 352, and a hammer head 353. One end of the first hammer rod 351 is detachably connected to the drive shaft 32, while the other end is hinged to the second hammer rod 352. The other end of the second hammer rod 351 strikes the vibrating anvil 52 via the hammer head 353. The rod body 51 can be made of round steel.

[0027] See Figure 6The packing mechanism 6 includes a packing sleeve 61, a clamping flange 62, sealing elements 63, and a gasket 64. The packing sleeve 61 is fixed to the wall of the inlet head 1. The rod body 51 passes through the inlet head 1 along the packing sleeve 61. Several sealing elements 63 are jointly sealed between the rod body 51 and the packing sleeve 61 by the clamping flange 62. The gasket 64 is located on the side of the clamping flange 62 facing away from each sealing element 63 and is sleeved outside the rod body 51. The sealing elements 63 can be made of oil-impregnated asbestos packing. The packing sleeve 61 and the clamping flange 62 can be reinforced with bolts. With the assistance of the packing mechanism 6, the vibrating rod 5 can not only smoothly transmit mechanical vibration force but also avoid air leakage.

[0028] See Figure 8 Each bearing 34 has an adjusting ring 36 mounted on the drive shaft 32 on its opposite sides, and each bracket 33 has a baffle 37 that can limit the corresponding adjusting ring 36. The combination of the adjusting ring 36 and the baffle 37 can precisely control the axial position of the drive shaft 32 and prevent the drive shaft 32 from shifting due to the hammer 35 and causing the mechanical vibration force transmission to fail.

[0029] See Figure 3 , Figure 4 and Figure 5 The suspension mechanism 7 includes a connector 71, a crossbeam 72, a top suspension device 73, a limiting plate 74, and a bottom suspension device 75. The upper and lower ends of the dust collection plate 2 are indirectly connected to the crossbeam 72 and the bottom suspension device 75 respectively through the connector 71. The top suspension device 73 is connected to the inlet end cap 1 and the crossbeam 72 respectively. The bottom suspension device 75 extends into the limiting plate 74 along the limiting groove. The upper end of the dust collection plate 2 is rotatable while the lower end is freely suspended. The connector 71 can be made of angle steel. This suspension method allows the dust collection plate 2 to vibrate under the indirect impact of the mechanical vibration mechanism 3, while avoiding large-scale movement of the dust collection plate 2 and causing overall positional shift.

[0030] Working process of this invention: As industrial flue gas enters the electric field along the inlet head 1, the dust collection plate 2 can pre-intercept dust particles in the industrial flue gas, thereby improving the dust removal effect of the electrostatic precipitator on industrial flue gas while making full use of the internal space of the inlet head 1. During operation, the mechanical rapping mechanism 3 can periodically provide mechanical rapping force to the dust collection plate 2 through the rapping rod 5, thereby knocking down the dust particles accumulated on the dust collection plate 2 and sending them directly into the ash hopper along the inlet head 1.

[0031] For the mechanical rapping mechanism 3, the motor 31 can drive the transmission shaft 32 to rotate at a specified speed, and each rapping hammer 35 located on the transmission shaft 32 can rotate accordingly and cause each hammer head 353 to swing at a specified frequency and strike the corresponding rapping anvil 52.

[0032] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A top-outer-side mechanical vibration type electrostatic precipitator, characterized in that: The device includes a dust collection plate (2), a mechanical vibration mechanism (3), a vibration rod (5), a filling mechanism (6), and a suspension mechanism (7). The dust collection plate (2) is embedded in the inlet head (1) with a limited amplitude of vibration through the suspension mechanism (7). One end of the vibration rod (5) is mechanically vibrated by the mechanical vibration mechanism (3) located outside the inlet head (1), while the other end extends into the inlet head (1) and transmits the mechanical vibration force to the dust collection plate (2). The filling mechanism (6) is sealed between the inlet head (1) and the vibration rod (5).

2. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 1, characterized in that: The inlet end cap (1) is divided into an outer layer (12) and an inner layer (11) from the inlet end to the outlet end. The dust collection plate (2) is located in the inner layer (11). The dust discharge angle of the inner layer (11) is controlled at 30 to 35°. The dust discharge angle of the outer layer (12) is greater than that of the inner layer (11).

3. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 2, characterized in that: The inner layer (11) is also equipped with several reinforcing members (8) at the wall.

4. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 1, characterized in that: The dust collection plate (2) has several dust collection groups (21) and each dust collection group (21) has several corrugated folding plates. Each dust collection group (21) is configured with at least one vibration point (22) connected to the vibration rod (5) and at least two suspension points (23) connected to the suspension mechanism (7).

5. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 1, characterized in that: The mechanical rapping mechanism (3) includes a motor (31), a drive shaft (32), a bracket (33), a bearing (34), and rapping hammers (35). The drive shaft (32) is horizontally arranged above the inlet end cap (1) through several brackets (33) equipped with bearings (34) and is driven to rotate by the motor (31). Several rapping hammers (35) are arranged sequentially on the drive shaft (32) along the length direction, with a spacing of 160 to 200° between two adjacent rapping hammers (35).

6. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 5, characterized in that: The bearing (34) includes a base (341), rollers (342) and a bolt (343). The base (341) has an upward-facing opening (3411) into which a drive shaft (32) can be inserted. Several rollers (342) are rotatably connected to the opening (3411). The opening (3411) is detachably closed by the bolt (343).

7. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 5, characterized in that: The vibrating rod (5) passes through the inlet end cap (1) through the rod body (51). A vibrating anvil (52) is installed at the exposed end of the rod body (51). The vibrating hammer (35) includes a first hammer rod (351), a second hammer rod (352), and a hammer head (353). One end of the first hammer rod (351) is detachably connected to the drive shaft (32), while the other end is hinged to the second hammer rod (352). The other end of the second hammer rod (351) strikes the vibrating anvil (52) through the hammer head (353).

8. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 7, characterized in that: The packing mechanism (6) includes a packing sleeve (61), a clamping flange (62), a seal (63), and a gasket (64). The packing sleeve (61) is fixed to the wall of the inlet head (1). The rod (51) passes through the inlet head (1) along the packing sleeve (61). Several seals (63) are sealed between the rod (51) and the packing sleeve (61) by the clamping flange (62). The gasket (64) is located on the side of the clamping flange (62) facing away from each seal (63) and is sleeved outside the rod (51).

9. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 5, characterized in that: Each of the bearings (34) has an adjustment ring (36) mounted on the transmission shaft (32) on its opposite sides, and each of the brackets (33) has a baffle (37) that can limit the corresponding adjustment ring (36).

10. The top-outer-side mechanical vibration type electrostatic precipitator as described in claim 1, characterized in that: The suspension mechanism (7) includes a connector (71), a crossbeam (72), a top suspension device (73), a limiting plate (74), and a bottom suspension device (75). The upper and lower ends of the dust collection plate (2) are indirectly connected to the crossbeam (72) and the bottom suspension device (75) respectively through the connector (71). The top suspension device (73) is connected to the inlet end cap (1) and the crossbeam (72) respectively. The bottom suspension device (75) extends into the limiting plate (74) along the limiting groove. The upper end of the dust collection plate (2) is rotatable while the lower end hangs freely.

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