Sealing device for anode vibrating shaft of electric dust remover

Abstract

The utility model relates to an electric dust remover anode vibrating shaft sealing device which comprises a vibrating shaft, a vibrating motor and a device shell fixed on a wall plate of an electric dust remover shell and further comprises a ventilation shaft, and one end of the ventilation shaft penetrates through the device shell and is connected with the output end of the vibrating motor. The other end of the ventilation shaft penetrates through a wall plate of the electric dust remover shell and extends into the electric dust remover, and the end, located in the electric dust remover, of the ventilation shaft is fixedly connected with a vibrating shaft; an inner air inlet pipe is arranged on the device shell, air enters the device shell through the inner air inlet pipe, two annular holes are annularly formed in a ventilation shaft, and the two annular holes are used for communicating the interior of the device shell with the interior of the electric dust remover; a heating system is arranged on the outer wall of the ventilation shaft and used for heating air entering the ventilation shaft, a hot air curtain is formed at the position of an annular hole in the inner end of the electric dust remover on the ventilation periphery, and the air leakage problem of the anode vibrating shaft can be thoroughly solved.

Description

Technical Field

[0001] The utility model relates to an anode vibration shaft sealing device for an electrostatic precipitator, belonging to the technical field of electrostatic precipitators. Background Art

[0002] The technical principle of an electrostatic precipitator (ESP) is to ionize the flue gas at high voltage using a negatively charged discharge electrode, generating a large number of negative ions. These ions attract dust particles in the flue gas, causing them to become negatively charged. Due to the principle of opposite charges attracting each other, the negatively charged dust particles move toward the grounded anode collector plate and are captured by it. When the anode collector plate needs to be cleaned, a motor mounted on the outside of the ESP rotates a rapping shaft that extends through the side panels of the ESP into the interior. A rapping hammer is mounted on the rapping shaft. The rotation of the rapping shaft drives the hammer to strike the rapping rod at the bottom of the anode plate, vibrating the plate and dislodging the dust particles. To prevent flue gas leakage, industrial ESPs typically operate under negative pressure, which can easily allow cold air to enter the ESP. However, the sealing device installed where the anode rapping shaft passes through the housing panel is prone to failure and air leakage when operating under strong negative pressure for a long time.

[0003] Existing patent 202011192320.3 discloses an electrostatic precipitator and a cathode rapping insulation device thereof, which allows hot air to enter the rapping box and form an air curtain between the insulating tube and the rapping shaft and between the collar and the insulating tube for insulation; however, there are the following disadvantages:

[0004] Its structure is complex and has unreasonable design features: the way and position of the air intake of its rapping box cannot guarantee the formation of a uniform wind curtain at the collar and insulating tube. The flow rate near the air inlet is bound to be larger than the air volume at the far end. If an effective wind curtain is to be formed, the air intake volume must be increased to compensate for the defect of unbalanced air volume. Otherwise, a good wind curtain isolation effect cannot be achieved. However, increasing the air volume also means an increase in system energy consumption. In addition, the hot air heat source of this patent is equipped with a sealing device, which is prone to temperature loss along the pipeline and also increases energy consumption. At the same time, air leakage may also occur at the junction of the rapping shaft drive connection end and the shaft and the rapping box. The cold air leaking in at this position may cause condensation on the insulator. Therefore, this patent fails to completely solve the technical problem of air leakage. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides an electrostatic precipitator anode rapping shaft sealing device, which can completely solve the problem of air leakage of the anode rapping shaft.

[0006] The technical solution of the utility model is as follows:

[0007] A sealing device for an anode rapping shaft of an electrostatic precipitator comprises a rapping shaft, a rapping motor and a device housing fixed on the wall panel of the electrostatic precipitator shell, and also comprises a ventilation shaft, one end of the ventilation shaft passes through the device housing and is connected to the output end of the rapping motor, the other end of the ventilation shaft passes through the wall panel of the electrostatic precipitator shell and extends into the interior of the electrostatic precipitator, and the end of the ventilation shaft located inside the electrostatic precipitator is fixedly connected to the rapping shaft; an inner air inlet pipe is provided on the device housing, and air enters the interior of the device housing through the inner air inlet pipe, and two annular holes are circumferentially provided on the ventilation shaft, and the two annular holes are used to connect the interior of the device housing and the interior of the electrostatic precipitator; a heating system is provided on the outer wall of the ventilation shaft, and the heating system is used to heat the air entering the interior of the ventilation shaft.

[0008] The heating system includes a heating coil sleeved on the outside of the ventilation shaft and a power connection control box fixed on the device casing. The power connection control box supplies power to the heating coil and adjusts the temperature.

[0009] The device shell includes an outer cylinder and an inner cylinder, and an insulation layer is provided between the outer cylinder and the inner cylinder to prevent the heat of the internally heated air from being lost.

[0010] Among them, an air inlet device is provided outside the device shell, and the air inlet device includes a drying box. The drying box is provided with an external air inlet, and the drying box is connected to the internal air inlet pipe. A desiccant is installed inside the drying box to reduce the humidity of the air entering the device.

[0011] Among them, a sealing plate is provided between the wall panel of the electrostatic precipitator shell and the ventilation shaft, and a gap is left between the sealing plate and the ventilation shaft. The gap should be as small as possible without affecting the free rotation of the ventilation shaft to reduce the air leakage here; the ventilation shaft is provided with a shaft end sealing device at the end away from the electrostatic precipitator, and the shaft end sealing device is used to seal the gap between the ventilation shaft and the device casing; the shaft end sealing device includes a base, which is provided between the ventilation shaft and the device casing, and the base and the ventilation shaft are filled with sealing filler, and a pressure plate is fixedly provided on the surface of the base, and the other end of the pressure plate is used to compact the sealing filler.

[0012] The ventilation shaft includes heat exchange fins arranged on and inside the shaft body. The heat exchange fins are arranged corresponding to the heating coil. The two ends of the ventilation shaft are respectively connected to the rapping shaft and the rapping motor through connecting flanges.

[0013] Among them, the two annular holes are respectively arranged on the ventilation shaft located inside the device shell and on the ventilation shaft located inside the electrostatic precipitator. The axis of the annular hole located on the ventilation shaft inside the device shell is perpendicular to the axis of the ventilation shaft, and the axis of the annular hole located on the ventilation shaft inside the electrostatic precipitator is set at an angle of 40° to 50° to the axis of the ventilation shaft, and is inclined toward the wall panel of the dust collector shell.

[0014] The utility model has the following beneficial effects:

[0015] This device adopts a unique hollow shaft air intake method. A ventilation shaft is set in the device shell, and the vibration motor and the vibration shaft are connected through the ventilation shaft for vibration. At the same time, an annular hole is set on the ventilation shaft to use negative pressure to spray to form an air curtain. The formed air curtain is more uniform. An independent heating device is set inside, and the heat exchange fins are set to increase the heat exchange area. On the one hand, it improves the thermal utilization rate of the device, and on the other hand, it avoids temperature loss and reduces equipment energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional layout diagram of the utility model;

[0017] Figure 2 This is a cross-sectional view of the ventilation shaft of the utility model;

[0018] Figure 3 This is the AA cross-sectional view of the ventilation shaft of the present invention.

[0019] The reference numerals in the figures are as follows:

[0020] 100. Vibrating shaft; 200. Dust collector housing wall panel; 300. Vibrating motor; 1. Air inlet device; 11. External air inlet; 12. Drying box; 13. Internal air inlet duct; 2. Device housing; 21. Outer cylinder; 22. Insulation layer; 23. Inner cylinder; 3. Shaft end sealing device; 31. Base; 32. Sealing packing; 33. Pressure plate; 4. Ventilation shaft; 41. Flange; 42. Heat exchange fins; 43. Shaft body; 5. Heating system; 51. Power connection control box; 52. Heating coil; 6. Sealing plate. DETAILED DESCRIPTION

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

[0022] See also Figures 1 to 3 , the utility model provides a technical solution:

[0023] An electrostatic precipitator anode rapping shaft sealing device comprises a rapping shaft 100, a rapping motor 300 and a device housing 2 fixed on the electrostatic precipitator housing wall plate 200, and also comprises a ventilation shaft 4, one end of the ventilation shaft 4 passes through the device housing 2 and is connected to the output end of the rapping motor 300, the other end of the ventilation shaft 4 passes through the electrostatic precipitator housing wall plate 200 and extends into the interior of the electrostatic precipitator, and the end of the ventilation shaft 4 located inside the electrostatic precipitator is fixedly connected to the rapping shaft 100, and the torque generated by the rapping motor 300 is transmitted to the internal rapping shaft 100 through the ventilation shaft 4; an inner air inlet pipe 13 is provided on the device housing 2, and air enters the interior of the device housing 2 through the inner air inlet pipe 13; two annular holes are circumferentially provided on the ventilation shaft 4, and the two annular holes are used to connect the interior of the device housing 2 and the interior of the electrostatic precipitator; a heating system 5 is provided on the outer wall of the ventilation shaft 4, and the heating system 5 is used to heat the air entering the interior of the ventilation shaft 4; a sealing plate 6 is provided between the electrostatic precipitator housing wall plate 200 and the ventilation shaft 4;

[0024] Specifically, the two annular holes are respectively arranged on the ventilation shaft 4 located inside the device housing 2 and on the ventilation shaft 4 located inside the electrostatic precipitator, wherein the axis of the annular hole located on the ventilation shaft 4 inside the device housing 2 is arranged perpendicular to the axis of the ventilation shaft 4, and the axis of the annular hole located on the ventilation shaft 4 inside the electrostatic precipitator is arranged at an angle of 40° to 50° to the axis of the ventilation shaft 4, and is inclined toward the dust collector housing wall panel 200.

[0025] Compared with the device of this proposal, the inside of the dust collector is a space with uniform pressure. Therefore, under the action of the negative pressure inside the dust collector, the heated air will be evenly sprayed toward the wall panel 200 of the dust collector shell, thereby forming an air curtain. Even if a trace amount of air enters through the gap between the sealing plate 6 and the ventilation shaft 4, it can be quickly blown away and mixed under the action of the wind curtain to achieve the effect of isolating air leakage.

[0026] The heating system 5 includes a heating coil 52 mounted on the outside of the ventilation shaft 4, and a power wiring control box 51 fixed to the device housing 2. The power wiring control box 51 supplies power to the heating coil 52 and adjusts the temperature. Specifically, the heating coil 52 uses the principle of magnetic induction to heat the ventilation shaft 4 passing through it. The heating power and temperature can be controlled by adjusting the current. They can also be directly set according to the operating conditions of the unit before leaving the factory. After installation, it can be powered on and used without adjustment.

[0027] The device housing 2 includes an outer cylinder 21 and an inner cylinder 23. An insulation layer 22 is provided between the outer cylinder 21 and the inner cylinder 23 to effectively prevent heat loss. An air inlet device 1 is provided outside the outer cylinder 21. The air inlet device 1 includes a drying box 12. The drying box 12 has an external air inlet 11, which is connected to the internal air inlet pipe 13. A desiccant is installed inside the drying box 12 to reduce the humidity of the air entering the device. The desiccant in the drying box 12 can be replaced according to usage.

[0028] After the external air is sucked in through the external air inlet 11 due to the negative pressure inside the dust collector, it first flows through the drying box 12. After passing through, the air can remove some water vapor to avoid bringing in moisture. The air enters the ventilation shaft 4 through the annular hole, and then moves in the shaft toward the wall panel 200 of the dust collector shell. When passing through the heating coil 52, it is heated to the set temperature, and finally enters the interior of the dust collector at another annular hole.

[0029] A shaft end sealing device 3 is provided at one end of the ventilation shaft 4 away from the electrostatic precipitator, and the shaft end sealing device 3 is used to seal the gap between the ventilation shaft 4 and the device housing 2; the shaft end sealing device 3 includes a base 31, which is provided between the ventilation shaft 4 and the device housing 2, and a sealing filler 32 is filled between the base 31 and the ventilation shaft 4, and a pressure plate 33 is fixedly provided on the surface of the base 31, and the other end of the pressure plate 33 is used to compact the sealing filler 32; even if a slight amount of air leakage occurs, after being heated by the internal heater, the cold air will not have any chance of contacting the electrostatic precipitator shell wall panel 200 and the internal structure of the electrostatic precipitator, thereby completely solving the adverse effects of air leakage of the anode vibration shaft 100.

[0030] The ventilation shaft 4 includes heat exchange fins 42 arranged on the shaft body 43 and inside the shaft body 43. The heat exchange fins 42 are evenly distributed inside the shaft body 43 at a certain angle. The heat exchange fins 42 are arranged corresponding to the heating coil 52. When the heating coil 52 performs magnetic induction heating on the transmission ventilation shaft 4, it will also heat the heat exchange fins 42 at the same time, thereby increasing the heat exchange area, improving the heat exchange efficiency, and reducing power consumption; the two ends of the ventilation shaft 4 are respectively connected to the vibrating shaft 100 and the vibrating motor 300 through the connecting flange 41.

[0031] The working principle of the above-mentioned electrostatic precipitator anode rapping shaft sealing device is as follows:

[0032] The external air is sucked in through the external air inlet 11 due to the negative pressure inside the dust collector, first flows through the drying box 12, and after passing through the drying box 12, part of the water vapor in the air is removed to avoid bringing in moisture, and then enters the inner cylinder 23 through the internal air inlet pipe 13, and then is sucked into the annular hole on the ventilation shaft 4 inside the device shell 2 by negative pressure, and is heated by the heating coil 52 to form hot air, and finally is ejected through the annular hole on the ventilation shaft 4 inside the electrostatic precipitator to form an air curtain.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electrostatic precipitator anode rapping shaft sealing device, comprising a rapping shaft (100), a rapping motor (300) and a device housing (2) fixed to an electrostatic precipitator housing wall plate (200), characterized in that: The invention also includes a ventilation shaft (4), one end of which passes through the device housing (2) and is connected to the output end of the rapping motor (300), and the other end of which passes through the electrostatic precipitator housing wall plate (200) and extends into the interior of the electrostatic precipitator, and the end of the ventilation shaft (4) located inside the electrostatic precipitator is fixedly connected to the rapping shaft (100); an inner air inlet pipe (13) is provided on the device housing (2), and air enters the interior of the device housing (2) through the inner air inlet pipe (13); two annular holes are circumferentially provided on the ventilation shaft (4), and the two annular holes are used to connect the interior of the device housing (2) and the interior of the electrostatic precipitator; and a heating system (5) is provided on the outer wall of the ventilation shaft (4), and the heating system (5) is used to heat the air entering the interior of the ventilation shaft (4).

2. The electrostatic precipitator anode rapping shaft sealing device according to claim 1, characterized in that: The heating system (5) comprises a heating coil (52) sleeved on the outside of the ventilation shaft (4), and a power connection control box (51) fixed on the device housing (2), wherein the power connection control box (51) supplies power to the heating coil (52) and performs temperature regulation.

3. The electrostatic precipitator anode rapping shaft sealing device according to claim 1, characterized in that: The device housing (2) comprises an outer cylinder (21) and an inner cylinder (23), and a heat-insulating layer (22) is provided between the outer cylinder (21) and the inner cylinder (23).

4. The electrostatic precipitator anode rapping shaft sealing device according to claim 1, characterized in that: An air inlet device (1) is provided outside the device housing (2), and the air inlet device (1) includes a drying box (12). An external air inlet (11) is provided on the drying box (12), the drying box (12) is connected to an internal air inlet pipe (13), and a desiccant is installed inside the drying box (12).

5. The electrostatic precipitator anode rapping shaft sealing device according to claim 1, characterized in that: A sealing plate (6) is provided between the electrostatic precipitator housing wall plate (200) and the ventilation shaft (4); a shaft end sealing device (3) is provided at one end of the ventilation shaft (4) away from the electrostatic precipitator, and the shaft end sealing device (3) is used to seal the gap between the ventilation shaft (4) and the device housing (2); the shaft end sealing device (3) includes a base (31), the base (31) is provided between the ventilation shaft (4) and the device housing (2), and a sealing filler (32) is filled between the base (31) and the ventilation shaft (4), and a pressure plate (33) is fixedly provided on the surface of the base (31), and the other end of the pressure plate (33) is used to compact the sealing filler (32).

6. The electrostatic precipitator anode rapping shaft sealing device according to claim 2, characterized in that: The ventilation shaft (4) comprises a shaft body (43) and heat exchange fins (42) arranged inside the shaft body (43); the heat exchange fins (42) are arranged corresponding to the heating coil (52); and both ends of the ventilation shaft (4) are respectively connected to the rapping shaft (100) and the rapping motor (300) through connecting flanges (41).

7. The electrostatic precipitator anode rapping shaft sealing device according to claim 1, characterized in that: The two annular holes are respectively arranged on a ventilation shaft (4) located inside the device housing (2) and on a ventilation shaft (4) located inside the electrostatic precipitator, wherein the axis of the annular hole located on the ventilation shaft (4) inside the device housing (2) is arranged perpendicular to the axis of the ventilation shaft (4), and the axis of the annular hole located on the ventilation shaft (4) inside the electrostatic precipitator is arranged at an angle of 40° to 50° with the axis of the ventilation shaft (4) and is inclined toward the precipitator housing wall panel (200).

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