Synchronous rotating electric field electrostatic dust collector for flue gas

Abstract

The invention belongs to the technical field of flue gas treatment, and particularly relates to a flue gas synchronous rotating electric field electrostatic precipitator which comprises a shell, a bottom plate with a notch is arranged on the bottom surface of the shell, an insulator chamber is arranged at the top of the shell, a rotating electric field is arranged in the shell, and the shell is mainly composed of a discharge electrode wire, a dust collection electrode plate and a rotating device. A rotation executing mechanism of the rotating device drives the rotating seat to rotate through a transmission shaft; the interior of the shell is divided into a plurality of independent closed small compartment electric fields, and a discharge electrode wire is arranged in the center of each small compartment electric field and connected with a power supply system. A plurality of small compartment electric fields are arranged in a shell, each small compartment electric field is provided with a discharge electrode wire and a dust collection electrode plate, and a rotating device is arranged to drive the small compartment electric fields to rotate; when the electric fields of all the small compartments are located at different positions in the rotating process, different effects are achieved, and electrostatic adsorption dust removal can be achieved in the relatively static environment; and in a relatively static environment, the power is cut off and the dust is removed by rapping.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, and is used for purifying pollutants discharged in industrial production processes such as thermal power, cement, and steel, and specifically relates to a flue gas synchronous rotating electric field electrostatic precipitator. Background Art

[0002] An electrostatic precipitator is a dust removal device that uses the force of an electric field to remove solid or liquid particles from a gas. The dust collection principle is to charge the dust in the electric field. The charged dust is deposited on the dust collecting electrode under the action of the electric field force and is captured on the dust collecting electrode. A conventional electrostatic precipitator is provided with a discharge electrode and a dust collecting electrode. The discharge electrode is connected to the output end of a high-voltage DC power supply so that an electrostatic field sufficient to ionize the gas is maintained between the discharge electrode and the dust collecting electrode. The electrons, anions, and cations generated after the gas is ionized are adsorbed on the dust passing through the electric field, and the dust acquires an electric charge. Under the action of the electric field force, the charged dust moves to the discharge electrode or dust collecting electrode with opposite polarity and is deposited, thereby being captured on the discharge electrode and the dust collecting electrode, and the dust and gas are separated.

[0003] Electrostatic precipitator has the advantages of large flue gas processing volume, low operating resistance, good temperature resistance, convenient operation and control, and small operation and maintenance workload. It is widely used in the field of flue gas dust removal of coal-fired boilers.

[0004] After a certain amount of dust is deposited on the discharge electrode and dust collecting electrode of the electrostatic precipitator, it must be cleaned regularly, otherwise the electric field strength and dust collection capacity will be reduced, affecting the dust removal efficiency. Therefore, a vibration cleaning device must be installed on the discharge electrode and the dust collecting electrode to remove the dust deposited on the discharge electrode and the dust collecting electrode by vibrating the discharge electrode and the dust collecting electrode. However, during vibration cleaning, secondary dust is easily generated, especially in the final electric field, which is easy to escape and discharge directly with the airflow, resulting in instantaneous excessive emissions, and cannot meet the environmental protection requirements of continuous, stable and low emissions. In addition, the dust collection performance of the electrostatic precipitator is also affected by the flue gas flow rate. Excessive wind speed will prevent the dust from fully staying in the electric field and quickly escape and discharge with the airflow, reducing the dust removal effect; at the same time, excessive wind speed, crossflow, and air leakage will also cause airflow dust.

[0005] The patent application number is CN201810021082.6, which mentions a rotating electrode plate electrostatic precipitator and an electrostatic precipitator, wherein the electrostatic precipitator is installed at the outlet end of the final electric field of the electrostatic precipitator, and the rotating dust collecting electrode plate unit is arranged horizontally in the direction of the flue gas flow, which can reduce the dust escape of the final electric field to a certain extent, especially the escape of secondary dust generated by the final electric field during vibration and cleaning. However, since the rotating dust collecting electrode plate unit is arranged horizontally in the direction of the flue gas flow, the flow cross-sectional area is reduced and the resistance is increased; at the same time, the flue gas flow velocity at the rotating dust collecting electrode plate is relatively high, and excessive wind speed will also cause dust in the airflow and quickly escape and discharge with the airflow, which is not conducive to the deposition of dust; in addition, when the rotating dust collecting electrode plate is rotating, causing dust to fall, it will also escape and discharge with the airflow. The patent application number is CN201620153902.3, which mentions a high-efficiency rotary enclosed electrostatic precipitator. When the electrostatic precipitator is vibrating and cleaning, it is necessary to close some electric field channels, which is equivalent to offline cleaning, reducing the flow cross-sectional area, causing resistance fluctuations, affecting the airflow, and needing to reduce the operating load of the unit, or when the unit load remains unchanged, it is necessary to adjust the operation of the induced draft fan, which has a certain impact on the operation of the unit system; in addition, closing some electric field channels will increase the load of other electric fields and reduce the dust removal effect of other electric fields. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a flue gas synchronous rotating electric field electrostatic precipitator, which solves the problem that secondary dust generated by the electrostatic precipitator during vibration cleaning is easily escaped and discharged directly with the airflow without affecting the operation of the unit system, while reducing the influence of airflow disturbance, and further improving the dust removal effect and vibration cleaning effect of the electrostatic precipitator.

[0007] To achieve the above object, the present invention provides the following technical solution: a flue gas synchronous rotating electric field electrostatic precipitator, comprising a shell, the shell is a cylindrical structure, and two long openings with the same height as the cylinder are opened on the side, one long opening is connected to an inlet flue, and the other long opening is connected to an outlet flue; a bottom plate is arranged on the bottom surface of the shell, and an insulator chamber is arranged on the top; the bottom plate is a fan-shaped flat plate, the diameter is the same as that of the cylindrical shell, and a notch is arranged, and an ash hopper is arranged below the bottom plate;

[0008] The interior of the shell is a rotating electric field, which is mainly composed of a discharge electrode, a dust collecting electrode plate and a rotating device. The rotating device is arranged at the center of the electrostatic precipitator and mainly includes a transmission shaft and a rotating actuator. The rotating actuator is installed above the insulator chamber, and the transmission shaft passes through the insulator chamber and the shell, with the upper end connected to the rotating actuator and the lower end passing through the bottom plate. A rotating seat is provided on the top of the shell, and the transmission shaft is fixedly arranged at the center of the rotating seat. The rotating actuator drives the rotating seat to rotate through the transmission shaft.

[0009] The rotating seat is a circular flat plate, with dust collecting plate mounting grooves and insulating porcelain sleeve mounting holes evenly arranged in the circumferential direction; the transmission shaft is a round rod, with multiple slots evenly arranged in the circumferential direction, and multiple dust collecting plates are evenly arranged inside the shell and in the circumferential direction of the transmission shaft, and the multiple dust collecting plates divide the interior of the cylindrical shell into multiple independently closed small chamber electric fields, and a discharge electrode wire is arranged at the center of each small chamber electric field; an insulating porcelain sleeve mounting hole of the rotating seat is provided with an insulating porcelain sleeve, and the insulating porcelain sleeve includes an upper cover plate and a lower cover plate, and the upper part of the discharge electrode wire is clamped and suspended on the insulating porcelain sleeve by the upper cover plate and the lower cover plate, and the middle and lower parts are suspended and inserted into the interior of the shell;

[0010] The discharge electrode is connected to a power supply system, which mainly includes a high-voltage power supply, a conductive wire, a conductive rail and a pantograph. The high-voltage power supply is connected to the discharge electrode through the conductive wire, the conductive rail, the pantograph and the upper cover plate in sequence to provide a negative high-voltage power supply to the discharge electrode.

[0011] Furthermore, the insulator chamber is a cylindrical hollow structure, including a circular top plate, a cylindrical side plate and an annular bottom plate, the annular bottom plate is arranged on the upper end surface of the shell, and the inner diameter is the same as that of the shell; the rotary actuator is installed on the circular top plate of the insulator chamber, and a sealed rotary support is installed on the annular bottom plate of the insulator chamber, and the rotating seat is arranged on the sealed rotary support and can rotate.

[0012] Furthermore, the angular position and number of the slots of the transmission shaft correspond to the dust collecting plate mounting slots of the rotating seat; the upper end of the dust collecting plate is installed in the dust collecting plate mounting slot of the rotating seat, and the inner side is installed in the slot of the rotating shaft, and seal one and seal two are respectively provided at the installation connection, and elastic sealing sheets are provided at the lower end and outer side of the dust collecting plate; the height of the dust collecting plate is the same as the depth of the slot; a sealed bearing is provided at the connection between the transmission shaft and the top plate, and a sealed sleeve is provided at the connection between the transmission shaft and the bottom plate.

[0013] Furthermore, the conductive rail is arranged above the insulating porcelain sleeve and is arranged according to the position of the power receiving area in an arc shape. The conductive rail is fixedly installed on the inner side of the circular top plate of the insulator chamber through an insulating porcelain column; the high-voltage power supply is arranged above the circular top plate of the insulator chamber and is connected to the conductive rail through the conductive wire passing through the circular top plate, and an insulating sleeve is provided outside the conductive wire.

[0014] Furthermore, the pantograph is a "ㄑ"-shaped elastic pantograph, which is fixedly mounted on the upper cover plate of the insulating porcelain sleeve, and each insulating porcelain sleeve is equipped with a pantograph.

[0015] Furthermore, the electric fields of the plurality of small chambers are divided into a power receiving area and a power off area, the power receiving area is connected to a negative high voltage power supply, and the power off area is not connected to the negative high voltage power supply.

[0016] Furthermore, rappers are provided above the discharge pole wires and dust collecting pole plates in the power-off zone. The rappers are installed on the circular top plate of the insulator chamber and include a discharge pole wire rapper and a dust collecting pole plate rapper.

[0017] Furthermore, a force transmission rod is arranged at the upper end of each dust collecting electrode plate.

[0018] Furthermore, the inlet flue is provided with an airflow detection device and a guide plate.

[0019] Furthermore, the discharge electrode wire is a barbed wire or a needle-pierced wire with a certain rigidity and good discharge effect.

[0020] Compared with the prior art, the present invention provides a flue gas synchronous rotating electric field electrostatic precipitator, which has the following beneficial effects:

[0021] 1. The present invention sets a plurality of small chamber electric fields in the shell, each of which is provided with a discharge electrode and a dust collecting electrode, and a rotating device is provided to drive the small chamber electric field to rotate; each small chamber electric field has different functions when it is in different positions during the rotation process, and can be used for dust removal by electrostatic adsorption in a relatively static environment; it can also be used for dust removal by power-off vibration in a relatively static environment. During electrostatic adsorption, the internal flue gas is in a relatively static electric field environment, without the disturbance of flowing flue gas and secondary dust, thereby improving the dust removal efficiency. During vibration cleaning, in a relatively static environment with the electric field turned off and without the disturbance of flowing flue gas, the dust naturally settles and falls into the ash hopper, without secondary dust, and the fallen dust will not escape and be discharged with the airflow, thereby improving the cleaning effect.

[0022] 2. The present invention adopts a rotating electric field structure, and the rotation speed is synchronously matched with the flue gas working condition, which does not affect the flue gas circulation and the operation of the unit system, and the resistance of the electrostatic precipitator is stable.

[0023] 3. The present invention adopts a rotating electric field structure, which has a compact structure, a tortuous flue gas path, no flow flue gas disturbance and can be connected in series in multiple stages for dust removal. It has high dust removal efficiency and can reduce the floor space by 20% compared with the electrostatic precipitator in the prior art, thereby reducing the cost of the dust collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 yes Figure 1 AA section view shown in .

[0026] Figure 3 yes Figure 2 MM cross-sectional view shown in .

[0027] Figure 4 yes Figure 1 BB cross-sectional view shown in .

[0028] Figure 5 yes Figure 1 CC section view shown in .

[0029] Figure 6 yes Figure 1 DD cross-sectional view shown in .

[0030] Figure 7 It is a schematic diagram of the pantograph structure.

[0031] Figure 8 It is a schematic diagram of the shaft structure.

[0032] Fig. 9 It is a schematic diagram of the rotating seat structure.

[0033] Fig.10 It is a schematic diagram of the power supply system structure.

[0034] Fig.11 It is a schematic diagram of the large-scale structure of the electrostatic precipitator of the present invention.

[0035] Fig.12 yes Fig.11 PP cross-sectional view shown in .

[0036] In the figure: 1 discharge electrode wire; 2 dust collecting electrode plate; 201 force transmission rod; 202 seal 1; 203 elastic sealing sheet; 204 seal 2; 3 rotating device; 301 transmission shaft; 302 sealing sleeve; 303 rotating actuator; 304 sealing bearing; 305 sealing slewing support; 306 rotating seat; 307 dust collecting electrode plate mounting groove; 308 insulating porcelain sleeve mounting hole; 309 card slot; 4 ash hopper; 5 inlet flue; 501 air flow Detection device; 502 guide plate; 6 outlet flue; 7 shell; 701 bottom plate; 702 notch; 8 insulating porcelain sleeve; 801 upper cover plate; 802 lower cover plate; 9 power supply system; 901 pantograph; 902 conductive rail; 903 high voltage power supply; 904 insulating bushing; 905 conductive wire; 906 insulating porcelain column; 10 rapper; 11 insulator chamber; 1101 circular top plate; 1102 cylindrical side plate; 1103 annular bottom plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-12 In this embodiment: a flue gas synchronous rotating electric field electrostatic precipitator includes a shell 7, which is a cylindrical structure, and has two long openings on the side with the same height as the cylinder, one long opening is connected to the inlet flue 5, and the other long opening is connected to the outlet flue 6. The bottom surface of the shell 7 is provided with a bottom plate 701, which is a fan-shaped flat plate with the same diameter as the cylindrical shell 7 and is provided with a notch 702 for ash falling. An ash hopper 4 is provided below the bottom plate 701 for storing ash.

[0039] An insulator chamber 11 is provided at the top of the shell 7. The insulator chamber 11 is a cylindrical hollow structure, including a circular top plate 1101, a cylindrical side plate 1102 and an annular bottom plate 1103. The annular bottom plate 1103 is arranged on the upper end surface of the cylindrical shell 7, and the inner diameter is the same as that of the cylindrical shell 7.

[0040] Further as Figure 1 , 2 As shown in Figures 1 and 8, the interior of the housing 7 is a rotating electric field, which is mainly composed of a discharge electrode 1, a dust collecting electrode 2 and a rotating device 3. The rotating device 3 is arranged at the center of the electrostatic precipitator and mainly includes a transmission shaft 301, a sealing sleeve 302, a rotating actuator 303, a bearing 304, a sealing slewing support 305 and a rotating seat 306. The rotating actuator 303 is installed on the circular top plate 1101 of the insulator chamber 11. The transmission shaft 301 passes through the insulator chamber 11 and the housing 7, the upper end is connected to the rotating actuator 303, and the lower end passes through the bottom plate 701. A sealed bearing 304 is provided at the connection between the transmission shaft 301 and the top plate 1101, and a sealed sleeve 302 is provided at the connection between the transmission shaft 301 and the bottom plate 701.

[0041] Further as Figure 2 , 8As shown in Figures 9 and 10, a rotating seat 306 is provided on the top of the housing 7, and a sealing rotary support 305 is installed on the annular bottom plate 1103 of the insulator chamber 11. The rotating seat 306 is a circular flat plate, and dust collecting plate mounting grooves 307 and insulating porcelain sleeve mounting holes 308 are evenly opened in the circumferential direction. The rotating seat 306 is arranged on the sealing rotary support 305 and can rotate. The sealing rotary support 305 is arranged on the annular bottom plate 1103 of the insulator chamber 11. The transmission shaft 301 is fixedly arranged at the center of the rotating seat 306. The transmission shaft 301 is a round rod, and a plurality of slots 309 are evenly opened in the circumferential direction. The angular position and number of the slots 309 correspond to the dust collecting plate mounting grooves 307 of the rotating seat 306. The rotary actuator 303 rotates the rotating seat 306 through the transmission shaft 301.

[0042] Further Figure 3 , 5 As shown, a plurality of dust collecting plates 2 are evenly arranged inside the shell 7 and in the circumferential direction of the transmission shaft 301. The height of the dust collecting plate 2 is the same as the depth of the slot 309. The upper end of the dust collecting plate 2 is installed in the dust collecting plate installation slot 307 of the rotating seat 306, and the inner side is installed in the slot 309 of the rotating shaft 301. Seals 1 202 and seals 204 are respectively arranged at the installation connection. At the same time, elastic sealing sheets 203 are arranged at the lower end and outer side of the dust collecting plate 2, so that the dust collecting plate 2 has a certain sealing property when rotating and a certain mobility when vibrating and cleaning.

[0043] Further Figure 4 , 7 As shown, multiple dust collecting plates 2 divide the interior of the cylindrical shell 7 into multiple independent and closed small chamber electric fields. In this embodiment, the interior of the shell 7 is divided into 8 small chamber electric fields, which are marked as ①②③④⑤⑥⑦⑧. A discharge electrode wire 1 is arranged at the center of each small chamber electric field. The discharge electrode wire 1 is a barbed wire or a needle wire with a certain rigidity and good discharge effect. The height of the shell 7 is set according to the length of the discharge electrode wire 1. An insulating porcelain sleeve 8 is provided on the insulating porcelain sleeve mounting hole 308 of the rotating seat 306. The insulating porcelain sleeve 8 includes an upper cover plate 801 and a lower cover plate 802. The upper cover plate 801 and the lower cover plate 802 clamp and suspend the upper part of the discharge electrode wire 1 on the insulating porcelain sleeve 8, and the middle and lower parts are suspended and inserted into the interior of the shell 7. The insulating porcelain sleeve 8 can ensure that the discharge electrode wire 1 will not shake when the electric field rotates.

[0044] The dust collecting electrode plate 2, the shell 7, the bottom plate 701 and the rotating seat 306 together form an independent and closed small chamber electric field space, the shell 7 and the bottom plate 701 are fixed, and the discharge electrode line 1, the dust collecting electrode plate 2 and the rotating seat 306 can rotate. When the electrostatic precipitator is working, the rotating actuator 303 rotates the rotating seat 306 through the transmission shaft 301, thereby driving the discharge electrode line 1 set on the rotating seat 306 and the dust collecting electrode plate 2 set on the transmission shaft 301 and the rotating seat 306 to rotate, forming a rotatable electric field.

[0045] Further Figure 1 , 4 As shown, in order to allow the dust-laden flue gas to have sufficient residence time in the electric field of each sub-chamber of the electrostatic precipitator to ensure the dust removal efficiency and the system balance and stable operation of the front and rear equipment of the electrostatic precipitator, the internal space volume and rotation speed of the rotating electric field need to match the flue gas conditions. Usually, when the boiler unit is in operation, the flue gas conditions have a certain volatility. In order to detect the flue gas conditions and ensure the system balance and stable operation, an airflow detection device 501 is set in the inlet flue 5 to detect the inlet flue gas conditions, feed back to the rotating actuator 303, and adjust the rotation speed of the rotating electric field. In addition, in order to make the flue gas quickly and evenly fill the sub-chamber electric field, a guide plate 502 is set in the inlet flue 5.

[0046] Further Figure 1 , 10 As shown, in order to maintain an electrostatic field sufficient to ionize the gas between the discharge electrode 1 and the dust collecting plate 2, the electrostatic precipitator is also provided with a power supply system 9 to provide a negative high-voltage power supply to the discharge electrode 1. The power supply system 9 mainly includes a high-voltage power supply 903, a conductive wire 905, a conductive rail 902, and a pantograph 901. The conductive rail 902 is arranged above the insulating porcelain sleeve 8, arranged according to the position of the power receiving area, and is in an arc shape. It is fixedly installed on the inner side of the circular top plate 1101 of the insulator chamber 11 through an insulating porcelain column 906. The high-voltage power supply 903 is arranged above the circular top plate 1101 of the insulator chamber 11, and is connected to the conductive rail 902 through the conductive wire 905 passing through the circular top plate 1101. The conductive wire 905 is provided with an insulating sleeve 904 outside. The pantograph 901 is a "ㄑ"-shaped elastic pantograph, which is fixedly installed on the upper cover plate 801 of the insulating porcelain sleeve 8, and each insulating porcelain sleeve 8 is equipped with a pantograph 901. The high-voltage power supply 903 is connected to the discharge electrode line 1 through the conductive wire 905 , the conductive rail 902 , the pantograph 901 and the upper cover plate 801 in sequence, and provides a negative high-voltage power supply to the discharge electrode line 1 .

[0047] Further Figure 2 , 4As shown, in order to enable the small chamber electric field to be powered off and vibrated, the multiple small chamber electric fields uniformly arranged in the annular direction are divided into a power receiving area and a power off area by setting the arc length of the conductive rail 902. The power receiving area needs to be connected to a negative high voltage power supply. In this embodiment, the arc length of the conductive rail 902 covers the positions ①②③⑥⑦⑧ of the small chamber electric field, as shown in FIG. Figure 4 As shown, the positions of the electric field ①②③⑥⑦⑧ of the small chamber are the power receiving area, which is connected to the negative high voltage power supply, and the positions of the electric field ④⑤ of the small chamber are the power off area, which is not connected to the negative high voltage power supply.

[0048] Further as Figure 1 , 3 As shown, in order to remove the dust accumulation on the discharge electrode line 1 and the dust collecting electrode plate 2, a rapper 10 is arranged above the discharge electrode line 1 and the dust collecting electrode plate 2 in the power-off area. The rapper 10 is installed on the circular top plate 1101 of the insulator chamber 11, as shown in FIG. Figure 4 As shown, only the rappers 10 are arranged above the two positions of the power-off zone ④⑤, and each position is respectively provided with a discharge electrode line rapper 10 and a dust collecting plate rapper 10. When the discharge electrode line is rapped, the rapper 10 directly raps at the top of the discharge electrode line 1 to shake off the dust accumulated on the discharge electrode line 1; when the dust collecting plate is rapped, in order to ensure that the rapper 10 can rap the dust collecting plate 2, a force transmission rod 201 can be arranged at the upper end of each dust collecting plate 2. When each dust collecting plate 2 rotates to the bottom of the rapper 10, the rapper 10 directly raps at the top of the force transmission rod 201, and the rapping force is transmitted to the dust collecting plate 2 through the force transmission rod 201, so that the dust collecting plate 2 vibrates and the dust accumulated on the dust collecting plate 2 is shaken off. The length of the rapper 10 can also be lengthened so that the rapper 10 directly raps at the upper end of the dust collecting plate 2.

[0049] A flue gas synchronous rotating electric field electrostatic precipitator, the working process of which is as follows:

[0050] (1) According to the layout of the boiler flue gas system, under the action of the blower in front of the electrostatic precipitator and the induced draft fan (not shown in the figure) behind the electrostatic precipitator, the small chamber electric field ⑦ is in a negative pressure state, and the negative pressure value is higher than the flue gas pressure in front of the electrostatic precipitator. When the small chamber electric field ⑦ rotates to the small chamber electric field ⑧ and ① positions in sequence, it is also in a negative pressure state. Therefore, the dust-containing flue gas in front of the electrostatic precipitator will enter and fill the small chamber electric field ① position;

[0051] (2) The electric fields of each sub-chamber ① to ⑧ are driven by the rotary actuator 303 to rotate at a uniform speed. After the dust-laden flue gas enters the electric field of the sub-chamber ① from the inlet flue 5, it will reach the positions of ①②③④⑤⑥⑦⑧ in sequence under the drive of the rotary actuator 303, and circulate in this way; according to the setting of the conductive rail 902, when the electric field of each sub-chamber is at the positions of ①②③ and ⑥⑦⑧, it is a power receiving area, connected to a negative high voltage power supply, and is in a power-on state; when it is at the positions of ④⑤, it is a power-off area, where no conductive rail 902 is set, and is in a power-off state;

[0052] (3) After the dust-laden flue gas enters the electric field position ① of the small chamber from the inlet flue 5, it reaches the positions ①②③④⑤⑥⑦⑧ in sequence under the drive of the rotating actuator 303. When it is in the ① position, it is the charging area, and the discharge electrode is connected to the output end of the high-voltage DC power supply, so that an electrostatic field sufficient to ionize the gas is maintained between the discharge electrode and the dust collecting electrode, and the gas is ionized to generate electrons, anions and cations. After the dust-laden flue gas enters ①, the electrons, anions and cations generated after the gas is ionized are adsorbed on the dust passing through the electric field, so that the dust acquires an electric charge. Under the action of the electric field force, the charged dust moves to the discharge electrode or the dust collecting electrode with opposite polarity and deposits, so that it is captured on the discharge electrode and the dust collecting electrode, so that the dust and gas are separated; when it is in the ②③ positions, the internal flue gas is in a relatively static electric field environment, there is no disturbance of the flowing flue gas, no secondary dust, and the dust removal efficiency is improved; when it is in the ④⑤ positions, the electric field is powered off and turned on Vibration cleaning, in a relatively static environment with power off and no disturbance from flowing flue gas, naturally settles and falls into the ash hopper from the gap of the bottom plate 701, without secondary dust, thus improving the cleaning effect; when in position ⑥, the dust in the flue gas in the sub-chamber has been captured and is in a clean flue gas state, and at the same time, the electric field is reconnected to the negative high-voltage power supply, so that the electric field is energized again and the uncaptured dust is re-absorbed; when in position ⑦, under the action of the induced draft fan, the clean flue gas is discharged from the outlet flue 6 of the rear stage of position ⑦, and a negative pressure state is placed inside ⑧, and at the same time, the electric field continues to adsorb the uncaptured dust to prevent the uncaptured dust from escaping from the outlet flue 6; when in position ⑧, the inside ⑧ is in a negative pressure state and there is no flue gas, waiting to be filled with dusty flue gas again after rotating to position ①, and this cycle is repeated.

[0053] Further Fig.10 , Fig.11 As shown, in order to adapt to the working conditions of large units processing large flue gas volumes, multiple groups of rotating electric field electrostatic precipitators can be combined into a large rotating electric field electrostatic precipitator to achieve multi-stage dust removal for large flue gas volumes. Fig.10 , Fig.11 As shown, from the inlet to the outlet, it is composed of 4 levels of dust removal, and each level is composed of 4 groups of rotating electric field electrostatic precipitators. A smoke collection inlet horn is set at the inlet, a smoke collection outlet horn is set at the outlet, wall panels are set on both sides, an ash collection hopper is set at the bottom, and the top is connected to the circular top plate of the insulator room to form an integral large top plate, so that the rotating electric field electrostatic precipitator has a large, square shell structure. In the shell, the 4 groups of rotating electric field electrostatic precipitators of the same level are connected in parallel and sealed together, so that the dust-containing flue gas can only flow to the next level of dust removal after passing through the previous level of dust removal; appropriate maintenance space is reserved between the front and rear levels of dust removal. When the rotating electric field electrostatic precipitator is working, each group of rotating electric field electrostatic precipitators rotates and works at the same time, keeping the outlet flue gas and the inlet flue gas flowing in and out synchronously, so as to achieve efficient dust removal of flue gas.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flue gas synchronous rotating electric field electrostatic precipitator, characterized in that: The utility model comprises a shell, which is in a cylindrical structure, and has two long openings on the side with the same height as the cylinder, one of which is connected to the inlet flue, and the other is connected to the outlet flue; a bottom plate is arranged on the bottom surface of the shell, and an insulator chamber is arranged on the top; the bottom plate is a fan-shaped flat plate, and has the same diameter as the cylindrical shell, and is provided with a notch, and an ash hopper is arranged below the bottom plate; The interior of the shell is a rotating electric field, which is mainly composed of a discharge electrode, a dust collecting electrode plate and a rotating device. The rotating device is arranged at the center of the electrostatic precipitator and mainly includes a transmission shaft and a rotating actuator. The rotating actuator is installed above the insulator chamber, and the transmission shaft passes through the insulator chamber and the shell, with the upper end connected to the rotating actuator and the lower end passing through the bottom plate. A rotating seat is provided on the top of the shell, and the transmission shaft is fixedly arranged at the center of the rotating seat. The rotating actuator drives the rotating seat to rotate through the transmission shaft. The rotating seat is a circular flat plate, with dust collecting plate mounting grooves and insulating porcelain sleeve mounting holes evenly arranged in the circumferential direction; the transmission shaft is a round rod, with multiple slots evenly arranged in the circumferential direction, and multiple dust collecting plates are evenly arranged inside the shell and in the circumferential direction of the transmission shaft, and the multiple dust collecting plates divide the interior of the cylindrical shell into multiple independently closed small chamber electric fields, and a discharge electrode wire is arranged at the center of each small chamber electric field; an insulating porcelain sleeve mounting hole of the rotating seat is provided with an insulating porcelain sleeve, and the insulating porcelain sleeve includes an upper cover plate and a lower cover plate, and the upper part of the discharge electrode wire is clamped and suspended on the insulating porcelain sleeve by the upper cover plate and the lower cover plate, and the middle and lower parts are suspended and inserted into the interior of the shell; The discharge electrode is connected to a power supply system, which mainly includes a high-voltage power supply, a conductive wire, a conductive rail and a pantograph. The high-voltage power supply is connected to the discharge electrode through the conductive wire, the conductive rail, the pantograph and the upper cover plate in sequence to provide a negative high-voltage power supply to the discharge electrode.

2. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 1, characterized in that: The insulator chamber is a cylindrical hollow structure, including a circular top plate, a cylindrical side plate and an annular bottom plate. The annular bottom plate is arranged on the upper end surface of the shell, and the inner diameter is the same as that of the shell. The rotary actuator is installed on the circular top plate of the insulator chamber, and a sealed rotary support is installed on the annular bottom plate of the insulator chamber. The rotating seat is arranged on the sealed rotary support and can rotate.

3. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 2, characterized in that: The angular position and number of the slots of the transmission shaft correspond to the dust collecting plate mounting slots of the rotating seat; the upper end of the dust collecting plate is installed in the dust collecting plate mounting slot of the rotating seat, and the inner side is installed in the slot of the rotating shaft, and seals 1 and 2 are respectively provided at the installation connection, and elastic sealing sheets are provided at the lower end and outer side of the dust collecting plate; the height of the dust collecting plate is the same as the depth of the slot; a sealed bearing is provided at the connection between the transmission shaft and the top plate, and a sealed sleeve is provided at the connection between the transmission shaft and the bottom plate.

4. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 3, characterized in that: The conductive rail is arranged above the insulating porcelain sleeve, arranged according to the position of the power receiving area, and is in an arc shape. The conductive rail is fixedly installed on the inner side of the circular top plate of the insulator chamber through an insulating porcelain column; the high-voltage power supply is arranged above the circular top plate of the insulator chamber, and is connected to the conductive rail through the conductive wire passing through the circular top plate, and an insulating sleeve is provided outside the conductive wire.

5. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 4, characterized in that: The pantograph is a "ㄑ"-shaped elastic pantograph, which is fixedly mounted on the upper cover plate of the insulating porcelain sleeve, and each insulating porcelain sleeve is equipped with a pantograph.

6. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 1, characterized in that: The electric fields of the multiple small chambers are divided into a power receiving area and a power off area. The power receiving area is connected to a negative high voltage power supply, and the power off area is not connected to the negative high voltage power supply.

7. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 6, characterized in that: A rapper is arranged above the discharge electrode wire and the dust collecting electrode plate in the power-off zone. The rapper is installed on the circular top plate of the insulator chamber and includes a discharge electrode wire rapper and a dust collecting electrode plate rapper.

8. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 7, characterized in that: A force transmission rod is arranged at the upper end of each dust collecting electrode plate.

9. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 1, characterized in that: The inlet flue is provided with an airflow detection device and a guide plate.

10. The flue gas synchronous rotating electric field electrostatic precipitator according to claim 1, characterized in that: The discharge electrode wire is a barbed wire or a needle-pierced wire with certain rigidity and good discharge effect.

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