WO2013166671A1

WO2013166671A1 - Radial-flow electric dust remover and power station boiler dust removal apparatus using same

Info

Publication number: WO2013166671A1
Application number: PCT/CN2012/075252
Authority: WO
Inventors: 孟金来
Original assignee: Meng Jinlai
Priority date: 2012-05-09
Filing date: 2012-05-09
Publication date: 2013-11-14

Abstract

Disclosed is a radial-flow electric dust remover, comprising a housing (1), two transmission shafts (2) mounted inside the housing (1) in the top part and the bottom part, sprockets (3) respectively mounted at the front and the back of the two transmission shafts (2), chains (4) respectively mounted on the sprockets (3) at the front and the back of the two transmission shafts (2), wherein brattice-type annular dust collecting electrodes (5) composed of several blocks that are hinged together, are arranged parallel to the direction of the transmission shafts (2) and have a dust collecting plate formed of porous foam metal mounted therein, are respectively mounted on each chain (4), and the annular dust collecting electrodes (5) are earthed. A separator plate (6) is provided inside the housing (1) to divide the inner cavity of same into an upper dust collecting chamber and a lower dust cleaning chamber. A first discharge electrode (7) is installed to the left of the annular dust collecting electrodes (5), and the first discharge electrode (7) is formed of several conductive wires arranged in parallel, with one end of the first discharge electrode (7) being fixed to the separator plate (6) in an insulated manner and the other end being fixed to the housing (1) in an insulated manner, and extending outwards to communicate with a negative electrode of a high-voltage DC power source. The left and right faces of the housing of the upper dust collecting chamber are respectively provided with an air current inlet and outlet (8, 9) perpendicular to the surface of the annular dust collecting electrodes (5). The left and right faces of the housing of the lower dust cleaning chamber are respectively provided with inlet and outlet interfaces (10, 11) in communication with a dust cleaning fluid source, wherein the rear end of one transmission shaft (2) extends out of the housing (1) to connect to a driving wheel (12) connected to a motive power source. The dust remover is characterised in that: a second discharge electrode (13) is installed to the right of the annular dust collecting electrodes (5), and the second discharge electrode (13) is formed of several conductive wires arranged in parallel, the second discharge electrode (13) is parallel to the first discharge electrode (7), with one end of the second discharge electrode (13) being fixed to the separator plate (6) in an insulated manner and the other end being fixed to the housing (1) in an insulated manner, and extending outwards to communicate with a negative electrode of a high-voltage DC power source.

Description

Runoff type electrostatic precipitator and power station boiler dust removing device using the same

Technical field

The present invention relates to the technical field of an electrostatic precipitator, and in particular to a radial flow type electrostatic precipitator and a power station boiler dust removing device using the same.

Background technique

The design principle of the electrostatic precipitator is to use the strong electric field generated by the high-voltage DC power source to ionize the negatively charged gas in the flue gas to generate corona discharge, so that the dust charge suspended in the gas reaches the electric field under the action of the electric field force. The electrodes of opposite polarity are used to achieve the purpose of separating the suspended dust from the gas.

As shown in Figure 1 and Figure 2, the patent number applied for in 2008 is 200810116107.7, and the name is "Electrical Precipitator with High Efficiency Dust Collector". Its design is mainly to use the above principles. It comprises a square cylindrical housing 3'. A horizontal drive shaft 4' is mounted on the upper and lower portions of the housing 3', and a front and a rear portions of the two drive shafts 4' are respectively mounted with a sprocket 5', and a sprocket at the front of the two drive shafts 4'. 5' and the sprocket 5' at the rear of the two transmission shafts 4' are respectively provided with chain 6', and each chain 6' is respectively arranged by a plurality of blocks arranged in parallel along the direction of the transmission shaft 4', hinged to each other, and mounted A curtain-type annular dust collecting pole 7' for a dust collecting plate or a dust collecting ball, and the dust collecting plate or the dust collecting ball is made of a porous foam metal material. Porous metal foam is a multi-purpose engineering material with excellent performance. The dust collecting electrode made of electrostatic precipitator has excellent permeability, strong mechanical structure, and large surface area to produce high average electric field strength. The annular dust collecting pole 7' is grounded. The partition 3' is partitioned into an upper dust collecting chamber and a lower dust chamber in the casing 3'; the discharge electrode 9' placed on the left side of the annular dust collecting pole 7' is a plurality of parallel conductive wires. One end is insulated from the isolation plate 8', and the other end is insulated from the casing 3' and extends outwardly to communicate with the negative pole of the high-voltage DC power supply; the left and right sides of the upper dust collection chamber are respectively provided with an air flow inlet and an air flow. Exit 2'. The inlet port 10' and the outlet port 1 communicating with the source of the dust-cleaning fluid are respectively disposed on the right and left sides of the lower dust chamber, and the rear end of the lower transmission shaft 4' extends out of the casing 3'. There is a drive wheel 12' connected to the power source. During operation, the dust-laden gas enters from the air inlet on the left side of the casing of the upper dust collecting chamber, and the partitioning plate 8' in the inner chamber of the casing 3' separates the casing 3' and the annular dust collecting pole 7' into an upper dust collecting body. In the two parts of the chamber and the lower dust cleaning chamber, when the continuously rotating curtain-type annular dust collecting pole 7' is turned to the upper side, under the action of the electric field force, the charged dust is adsorbed on the dust collecting plate or the dust collecting ball, and the gas flows from the airflow. The outlet 2' flows out; when the dust collecting plate or the dust collecting ball is turned to the lower side, the dusting fluid source enters from the inlet port 10', and the dust collecting plate or the dust collecting ball is cleaned and discharged from the outlet port 1 , dust, etc. are collected through the ash bucket. Collect dust and dust continuously in this way.

However, the existing electrostatic precipitator can only remove industrial dust of PM5 (particles with a diameter of less than or equal to 5 microns), and the dust of the particles cannot be removed, so further improvement is needed.

Summary of the invention It is an object of the present invention to provide a radial type electrostatic precipitator and a power station boiler dust removing device using the same, which can remove fine industrial dust of PM2.5 and below, and has high dust removal efficiency.

In order to achieve the above solution, the technical solution of the present invention is: a radial flow type electrostatic precipitator comprising a housing, two transmission shafts are mounted in parallel on the upper and lower sides of the housing, and front and rear portions of the two transmission shafts The sprocket is separately mounted, and the sprocket of the front and rear portions of the two transmission shafts are respectively respectively provided with chains, and each of the chains is respectively arranged by a plurality of blocks arranged in parallel along the direction of the transmission shaft, hinged to each other, and filled with porous foam. a rotating curtain type dust collecting pole composed of a dust collecting plate made of metal, the annular dust collecting pole is grounded, and the casing is provided with an inner chamber divided into an upper dust collecting chamber and a lower dust cleaning chamber. a first discharge electrode is mounted on the left side of the annular dust collecting pole, the first discharge is a plurality of electrically conductive lines arranged in parallel, one end of the first discharge electrode is insulated from the isolation plate, and the other end is sealed with the shell The body is insulated and extends outwardly to communicate with the negative pole of the high-voltage DC power source, and the left and right sides of the casing of the upper dust collecting chamber are respectively provided with airflow inlets and outlets perpendicular to the surface of the annular dust collecting pole, and the lower dust is cleaned The housing of the chamber is left, The right side is respectively provided with an inlet and an outlet interface communicating with the source of the dust-cleaning fluid, wherein the rear end of one of the transmission shafts is extended from the housing and connected to the driving wheel connected to the power source, wherein the right side of the annular dust collecting pole is installed a second discharge electrode, the second discharge is a plurality of conductive lines arranged in parallel, the second discharge electrode is parallel to the first discharge electrode, and one end of the second discharge electrode is insulated from the isolation plate, and the other end is insulated from the housing Fixed and extended outward to communicate with the negative pole of the high voltage DC power supply.

The radial type electrostatic precipitator of the present invention, wherein the first parallel electrode made of porous foam metal is disposed between the annular dust collecting pole and the first discharge electrode and/or between the annular dust collecting pole and the second discharging electrode The electric field negative plate, the first parallel electric field negative plate is connected to the negative electrode of the high voltage direct current power source.

In the radial type electrostatic precipitator of the present invention, the left and right portions of the inner cavity of the annular dust collecting pole are respectively provided with third and fourth discharge electrodes, and the third and fourth discharge electrodes are a plurality of parallel arranged wires. The first, second, third, and fourth discharge electrodes are all parallel, and one ends of the third and fourth discharge electrodes are respectively insulated from the isolation plate, and the other ends are respectively insulated from the casing, and respectively protruded outwardly from the high-voltage DC power supply. The negative electrode is connected.

The radial type electrostatic precipitator of the present invention, wherein a second connection between the annular dust collecting pole and the third discharging electrode, and/or between the annular dust collecting pole and the fourth discharging electrode is provided with a negative electrode connected to the high voltage direct current power source Parallel electric field negative plate.

The radial type electrostatic precipitator of the present invention, wherein the inlet port is connected with an intake pipe connected to a source of a cleaned dust fluid, the air intake pipe is provided with an air compressor, and one end of the intake pipe extends into the annular dust collecting pole a lower inner cavity, a portion of the air inlet tube located outside the annular dust collecting pole is provided with a first blower, the air blowing port of the first blower is directly opposite the outer surface of the annular dust collecting pole, and the air inlet pipe is located a second blower is disposed on a portion of the annular dust collecting inner cavity, the blowing port of the second blowing machine is opposite to the inner cavity surface of the annular dust collecting pole, and the outlet port is connected to the first exhaust pipe, One end of the first exhaust pipe extends into the lower clean room and faces the lower outer surface of the annular dust collecting pole, and the other end of the first exhaust pipe extends out of the casing of the lower dust chamber, a lower end of the lower cleaning chamber is in communication with the second exhaust pipe, a valve is disposed on the second exhaust pipe, and the other end of the first exhaust pipe is in communication with the second exhaust pipe, the second A dust suction fan is disposed on the exhaust pipe, and the other end of the second exhaust pipe is connected to the dust collection bag. In the radial flow type electrostatic precipitator of the present invention, the annular dust collecting pole has a rectangular cross section, and the porous foam metal distribution is gradually reduced from the outer side to the center density or the density is uniform.

In the radial type electrostatic precipitator of the present invention, the distance between the first, second, third and fourth discharge electrodes and the annular dust collecting pole is 100-300 mm.

In the radial type electrostatic precipitator of the present invention, the distance between the first and second parallel electric field negative plates and the annular dust collecting pole is 10-200 mm, and the annular dust collecting pole and the first and second parallel electric field negative electrode plates The voltage between the two is 30%-60% of the breakdown voltage under the annual average humidity of the local atmospheric pressure.

2-1ΜΡ。 The flow-type electrostatic precipitator of the present invention, wherein the pressure of the air compressor is 0. 2-1 ΜΡ.

The utility model relates to a power station boiler dust removing device using a radial flow type electrostatic precipitator, which comprises a radial flow type electric precipitator and a bypass pipe, wherein the air flow inlet of the radial flow type electric precipitator is connected to the exhaust pipe of the power station boiler through the second intake pipe, The airflow outlet of the radial type electrostatic precipitator is in communication with the third exhaust pipe, and the bypass pipe is connected between the second intake pipe and the third exhaust pipe, and the said side is located at the front side of the rear end of the bypass pipe The second intake pipe is provided with a first valve, and the third exhaust pipe located at the rear side of the front end of the bypass pipe is provided with a second valve, and the bypass pipe is provided with a third valve.

After adopting the above solution, the radial type electrostatic precipitator of the present invention adds a second discharge electrode to the right side of the annular dust collecting pole on the basis of the existing electrostatic precipitator, so that the second discharge electrode is connected with the negative electrode of the high voltage direct current power source, when the dust After entering from the airflow inlet, the dust is moved to the surface of the annular dust collecting electrode by the electric field force between the first discharge electrode and the annular dust collecting electrode, so that the dust of the PM5 is adhered to the annular dust collecting pole. The porous foam metal surface, and the dust less than PM5 is not adhered by the porous foam metal of the annular dust collecting pole, and will continue to move to the right under the action of the flue gas flow, finally moving out of the annular dust collecting pole, and passing through the ring A second discharge electrode connected to the negative pole of the high-voltage DC power supply is added to the right side of the dust collecting pole, so that another electric field is formed between the second discharge electrode and the annular dust collecting pole, and the electric field force is greater than the force of the exhaust gas flow, preventing The dust continues to move to the right, and the dust is moved to the left to the left side of the annular dust collecting electrode surface, so that the dust removing effect is improved from the original PM5 to PM2. 5 , the dust removing effect is greatly improved; and the electrostatic precipitator is used for electricity When the boiler is on the boiler, the airflow inlet of the electrostatic precipitator is connected to the power station boiler through the second intake pipe, and the airflow outlet is connected with the third exhaust pipe. When the boiler is in normal use, the third valve on the bypass pipe is closed, The first valve of the second intake pipe and the second valve of the third exhaust pipe are opened, and the exhaust gas of the power station boiler enters the inner cavity of the radial type electrostatic precipitator through the second intake pipe, and is discharged from the third exhaust pipe after being dusted. Since the power plant boiler uses an oil ignition system, when the boiler is ignited before use, since the unburned portion of the fuel is easily stuck to the porous foam metal of the annular dust collecting electrode, it is difficult to remove the first foam. Open the third valve of the bypass pipe. After the ignition of the boiler is finished, open the first and second valves and close the third valve to ensure that the electrostatic precipitator does not work during the ignition fuel phase, and then effectively perform dust removal work.

DRAWINGS

1 is a cross-sectional structural view of a conventional electrostatic precipitator;

Figure 2 is a cross-sectional view showing the structure taken along line A-A of Figure 1;

3 is a cross-sectional structural view of the radial type electrostatic precipitator of the present invention; Figure 4 is a cross-sectional view showing the structure taken along line BB of Figure 3;

Figure 5 is a cross-sectional view showing the annular dust collecting pole of the radial type electrostatic precipitator of the present invention;

Fig. 6 is a structural schematic view of a dust removing device for a power station boiler using a radial flow type electrostatic precipitator according to the present invention.

The present invention will be further described by way of embodiments with reference to the accompanying drawings;

detailed description

As shown in Figures 3, 4 and 5, the radial type electrostatic precipitator of the present invention comprises a housing 1. Two horizontal drive shafts 2 are arranged above and below the housing 1. The front and rear ends of the two transmission shafts are respectively supported on the casing 1. The sprocket 3 is attached to the front and rear portions of the two transmission shafts 2, respectively. A chain 4 is mounted on the front two sprockets 3 of the two drive shafts 2. A chain 4 is mounted on the rear of the two transmission shafts 2 on the two sprocket wheels 3. The two chains 4 are respectively provided with a plurality of rotary curtain type dust collecting poles 5 which are arranged in parallel along the direction of the transmission shaft 2, are hinged to each other, and are provided with a dust collecting plate made of a porous foam metal material. The annular dust collecting pole 5 is grounded. The annular dust collecting pole 5 has a rectangular cross section, and its porous foam metal distribution gradually decreases from the outer side to the center density. Here, the porous metal foam distribution may also be uniformly disposed inside and outside. It also ensures that the dust can adhere to the porous metal surface. The casing 1 is welded with a partitioning plate 6 which divides its inner cavity into an upper dust collecting chamber and a lower dust cleaning chamber. A first discharge electrode 7 is attached to the left side of the annular dust collecting pole 5. The first discharge electrode 7 is a plurality of electrically conductive wires arranged in parallel. The lower end of the first discharge electrode 7 is fixedly connected to the partition plate 6 through an insulating sleeve. The upper end of the first discharge electrode 7 is fixedly connected to the casing 1 through an insulating sleeve, and protrudes outwardly to communicate with the negative electrode of the high voltage DC power source. The distance between the first discharge electrode 7 and the annular dust collecting pole 5 is 100-300. The field strength of the first dust removing electric field ensures that the dust is sufficiently adsorbed on the annular dust collecting pole 5. A first electric dust removal field is formed between the first discharge electrode 7 and the annular dust collecting pole 5. The air inlet 8 and the air outlet 9 perpendicular to the surface of the annular dust collecting pole 5 are respectively opened on the left and right sides of the casing of the upper dust collecting chamber. The gas flow inlet 8 is in communication with the exhaust gas to be purged. The left and right sides of the lower cleaning chamber are respectively machined with an inlet port 10 and an outlet port 11 which communicate with a source of cleaned dust. The source of the dusting fluid may be hot air or purified flue gas from the air preheating outlet or heated hot air or unheated air. The intake pipe 17 is connected to the inlet port 10. An air compressor 23 is mounted on the intake pipe 17. The pressure of the air compressor 23 is 0. 2-1 ΜΡ. One end of the intake pipe 17 projects from the front opening of the annular dust collecting pole 5 into the lower inner cavity of the annular dust collecting pole 5. The first blower 18 is mounted on a portion of the intake pipe 17 located outside the annular dust collecting pole 5. The air blowing port of the first blower 18 faces the outer surface of the annular dust collecting pole 5. A second blower 19 is mounted on a portion of the intake pipe 17 located in the inner cavity of the annular dust collecting pole 5. The air blowing port of the second blower 19 faces the inner surface of the annular dust collecting member 5. The outlet port 11 is connected to the first exhaust pipe 20. One end of the first exhaust pipe 20 extends into the lower cleaning chamber and faces the lower outer surface of the annular dust collecting pole 5. The other end of the first exhaust pipe 20 extends out of the casing of the lower clean room. The lower end of the lower cleaning chamber is in communication with the second exhaust pipe 21. A valve 22 is mounted on the second exhaust pipe 21, and the other end of the first exhaust pipe 20 communicates with the second exhaust pipe 21, and the second exhaust pipe 21 is provided with a cleaning blower 31. The other end of the second exhaust pipe 21 is connected to the dust collecting bag 24.

The rear end of the drive shaft 2 located below protrudes from the housing 1 and is connected to the drive wheel 12 to which the power source is connected. The second discharge electrode 13 is mounted to the right of the annular dust collecting pole 5, and the second discharge electrode 13 is also a plurality of electrically conductive wires arranged in parallel. Second discharge electrode 13 flat The first discharge electrode 7 is arranged. One end of the second discharge electrode 13 is fixedly connected to the isolation plate 6 through an insulating sleeve, and the other end of the second discharge electrode 13 is fixedly connected to the casing 1 through an insulating sleeve, and protrudes outwardly to communicate with the negative electrode of the high-voltage DC power source. The distance between the second discharge electrode 13 and the annular dust collecting pole 5 is 100-300 mm. The field strength of the second dust-removing electric field is ensured to sufficiently adsorb the dust on the annular dust collecting pole 5. A second dust-removing electric field is formed between the second discharge electrode 13 and the annular dust collecting pole 5. 5。 The experiment shows that the first dust-removing electric field and the second dust-removing electric field can work together to remove dust PM2.5.

The third discharge electrode 15 and the fourth discharge electrode 16 are attached to the left and right portions of the inner cavity of the annular dust collecting pole 5, respectively. The third discharge electrode 15 and the fourth discharge electrode 16 are a plurality of wires arranged in parallel. The first discharge electrode 7, the second discharge electrode 13, the third discharge electrode 15 and the fourth discharge electrode 16 are all parallel. One ends of the third discharge electrode 15 and the fourth discharge electrode 16 are respectively insulated from the isolation plate 6 by an insulating rod, and the other ends are respectively insulated from the casing 1 by an insulating rod, and respectively extend outwardly to communicate with the negative electrode of the high-voltage DC power source. A third dust-removing electric field is formed between the third discharge electrode 15 and the annular dust collecting pole 5. A fourth dust-removing electric field is formed between the fourth discharge electrode 16 and the annular dust collecting pole 5. Thus, the first, second, third, and fourth dust-removing electric fields are formed around the annular dust collecting pole 5, so that the electric field strength of the adsorbed dust can be increased, thereby improving the ability to adsorb dust. The distance between the third discharge electrode 15, the fourth discharge electrode 16 and the annular dust collecting pole 5 is 100-300 mm. The field strength of the third dust-removing electric field and the fourth dust-removing electric field is ensured to sufficiently adsorb the dust on the annular dust collecting pole 5.

A first parallel electric field negative plate 14 made of porous metal foam is disposed between the annular dust collecting electrode 5 and the second discharge electrode 13. The first parallel electric field negative plate 14 is in communication with the negative electrode of the high voltage direct current power source. The distance between the first parallel electric field negative plate 14 and the annular dust collecting pole 5 is 10-200 mm, and the voltage between the first parallel electric field negative electrode plate 14 and the annular dust collecting pole 5 is the local atmospheric pressure annual average humidity condition. 30%-60% of the voltage. Adding a first parallel electric field negative plate 14 in the second dust removal electric field, when some of the dust below PM1 has the first, second, third, and fourth dust removing electric fields, but is still not adsorbed to the annular dust collecting pole 5, During the process of continuing to move to the right after the strong wind blown by the left side airflow inlet 8 blows out the annular dust collecting pole 5, the electric field force between the first parallel electric field negative electrode plate 14 and the annular dust collecting pole 5 may be reversed. It is blown back into the inner cavity of the annular dust collecting pole 5 and finally falls into the lower dust cleaning chamber. Only a first parallel electric field negative plate 14 is added between the second dust removal electric field in the figure, and in actual use, it may be in the first dust removal electric field and/or the second dust removal electric field and/or the third according to the use condition. A second parallel electric field negative plate is added to the dust removal electric field and/or the fourth dust removal electric field to completely collect fine dust.

When in use, the airflow inlet 8 is connected with the industrial exhaust flue that needs to be dusted, and the first, second, third, and fourth dust-removing electric fields are all turned on, and the unpurified flue gas enters the first, second, third, and fourth dust-removing electric fields, continuous The rotating annular dust collecting pole 5 causes dust to be trapped on each surface of the annular dust collecting pole 5, and when the annular dust collecting pole 5 collects dust to a certain amount, the annular dust collecting pole 5 is driven. The wheel 12 drives the slow movement. At this time, the air compressor 23 and the cleaning air suction fan 31 are turned on, and the air compressor 23 transmits the wind power to the first hair dryer 18 and the second hair dryer 19 for cleaning, and a part of the dust falling from the annular dust collecting pole 5 enters. The inner cavity of the first exhaust pipe 20 partially falls into the bottom of the inner cavity of the casing 1. At this time, the dust in the first exhaust pipe 20 is sucked into the dust collecting bag 24 by the cleaning action of the cleaning fan 31, and a part of the dust is collected. After falling into the bottom of the casing 1, it is sucked into the second exhaust pipe 21 by the cleaning suction blower 31, and finally sucked into the dust collecting bag 24 for collection. Such a loop Upon completion, continue the cycle according to the above process to remove dust from the industrial exhaust flue.

As shown in Fig. 6, the power plant boiler dust removing device using the radial flow type electrostatic precipitator of the present invention comprises a radial flow type electrostatic precipitator and a bypass pipe 25. The airflow inlet 8 of the radial type electrostatic precipitator is connected to the exhaust duct of the power station boiler through the second intake pipe 26. The airflow outlet 9 of the radial type electrostatic precipitator 24 is in communication with the third exhaust pipe 27. A bypass pipe 25 is connected between the second intake pipe 26 and the third exhaust pipe 27, and a first valve 28 is mounted on the second intake pipe 26 on the front side of the rear end of the bypass pipe 25. A second valve 29 is mounted on the third exhaust pipe 27 on the rear side of the front end of the bypass pipe 25. A third valve 30 is mounted on the bypass pipe 25.

Since the power plant boiler uses an oil ignition system, the unburned portion of the fuel sticks to the porous foam metal of the annular dust collecting pole 5 of the radial type electrostatic precipitator, which is liable to cause difficulty in cleaning. A third valve 30 is provided on the bypass pipe 25 by adding a bypass pipe 25 between the airflow inlet 8 and the airflow outlet 9. In the ignition fuel phase, the first valve 28 on the second intake pipe 26 and the second valve 29 on the third exhaust pipe 27 are closed to open the third valve 30, and when the ignition is finished, the first valve 28 and The second valve 29 is opened to close the third valve 30. The radial type electrostatic precipitator on the power station boiler does not work during the ignition phase, but starts to work after the ignition is completed. This ensures the normal operation of the radial type electrostatic precipitator and is not affected by the unburned oil.

The above described embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Modifications and improvements are intended to fall within the scope of the invention as defined by the appended claims.

Industrial applicability

The radial type electrostatic precipitator of the invention and the power station boiler dust removing device using the electric precipitator are mainly used for collecting industrial dust, and the industrial dust below PM1 can be collected and removed by connecting the device to the industrial exhaust flue, and the dust removing effect is obtained. Significant, so it has high industrial applicability.

Claims

Rights request

A radial flow type electrostatic precipitator comprising a casing (1), two transmission shafts (2) are mounted in parallel on the upper and lower portions of the casing (1), and the front of the two transmission shafts (2) A sprocket (3) is respectively mounted on the rear portion, and a chain (4) is respectively mounted on the front and rear sprocket wheels (3) of the two transmission shafts (2), and each of the chains (4) is respectively mounted by a plurality of blocks are arranged in parallel along the direction of the transmission shaft (2), are hinged to each other, and are provided with a curtain-type annular dust collecting pole (5) composed of a dust collecting plate made of porous foam metal, and the annular dust collecting pole (5) Grounding, the casing (1) is provided with a partitioning plate (6) for dividing the inner cavity into an upper dust collecting chamber and a lower dust cleaning chamber, and the left side of the annular dust collecting pole (5) is installed. a discharge electrode (7), the first discharge electrode (7) is a plurality of conductive wires arranged in parallel, one end of the first discharge electrode (7) is insulated from the isolation plate (6), and the other end is connected to the housing

(1) The insulation is fixed and extends outwardly to communicate with the negative pole of the high-voltage DC power source, and the left and right sides of the casing of the upper dust collecting chamber are respectively provided with airflow inlets and outlets perpendicular to the surface of the annular dust collecting pole (5) ( 8, 9), the left and right sides of the lower cleaning chamber are respectively provided with inlet and outlet interfaces (10, 11) communicating with the source of the cleaned dust, wherein the rear end of one of the drive shafts (2) protrudes from the shell The body (1) is connected to a driving wheel (12) connected to the power source, and is characterized in that: a second discharging electrode (13) is mounted on the right side of the annular dust collecting pole (5), and the second discharging electrode ( 13) a plurality of parallel conductive lines, the second discharge electrode (13) is parallel to the first discharge electrode (7), and the second discharge electrode (13) end is insulated from the isolation plate (6). The other end and the housing

(1) Insulated and fixed, and extended outward to communicate with the negative pole of the high-voltage DC power supply.

2. The radial type electrostatic precipitator according to claim 1, wherein: the annular dust collecting pole (5) and the first discharge electrode (7) and/or the annular dust collecting pole (5) A first parallel electric field negative plate (14) made of porous metal foam is disposed between the second discharge electrode (13), and the first parallel electric field negative plate (14) is in communication with the negative electrode of the high voltage direct current power source.

The radial type electrostatic precipitator according to claim 1 or 2, wherein: the left and right portions of the inner cavity of the annular dust collecting pole (5) are respectively provided with third and fourth discharge electrodes (15, 16), the third and fourth discharge electrodes (15, 16) are a plurality of parallel arranged wires, and the first, second, third and fourth discharge electrodes (7, 13, 15, 16) are parallel, The third and fourth discharge electrodes (15, 16) are respectively insulated from the isolation plate (6), and the other ends are respectively insulated from the casing (1), and respectively extend outwardly to communicate with the negative pole of the high-voltage DC power source.

The radial type electrostatic precipitator according to claim 3, wherein: the annular dust collecting pole (5) and the third discharging electrode (15), and/or the annular dust collecting pole (5) A second parallel electric field negative plate connected to the negative electrode of the high voltage DC power source is disposed between the fourth discharge electrode (16).

The radial type electrostatic precipitator according to claim 1 or 2 or 4, wherein: the inlet port (10) is connected to an intake pipe (17) communicating with a source of cleaned dust, the intake pipe (17) An air compressor (23) is mounted thereon, one end of the intake pipe (17) extends into a lower inner cavity of the annular dust collecting pole (5), and the air inlet pipe (17) is located at the annular dust collecting pole (5) The outer portion is provided with a first blower (18), the blow port of the first blower (18) is directly opposite the outer surface of the annular dust collecting pole (5), and the intake pipe (17) is located a second blower is provided on a portion of the inner cavity of the annular dust collecting pole (5) (19), the blowing port of the second blower (19) is facing the inner cavity surface of the annular dust collecting pole (5), and the outlet port (11) is connected to the first exhaust pipe (20), One end of the first exhaust pipe (20) extends into the lower dust chamber and faces the annular dust collecting pole

a lower outer surface of the (5), the other end of the first exhaust pipe (20) extends out of the casing of the lower clean room, and the lower end of the lower clean room and the second exhaust pipe (21) Connected, the second exhaust pipe (21) is provided with a valve (22), and the other end of the first exhaust pipe (20) is in communication with the second exhaust pipe (21), the second exhaust The tube (21) is provided with a dust suction fan (31), and the other end of the second exhaust pipe (21) is connected to the dust collection bag (24).

6. The radial type electrostatic precipitator according to claim 3, wherein: the annular dust collecting pole (5) has a rectangular cross section, and the porous foam metal has a gradually decreasing density or density from the outer side to the center. Evenly.

The radial type electrostatic precipitator according to claim 3, wherein: the first, second, third, and fourth discharge electrodes (7, 13, 15, 16) and the annular dust collecting electrode (5) The distance between them is 100-300.

The radial type electrostatic precipitator according to claim 2 or 4, wherein: the distance between the first and second parallel electric field negative plates and the annular dust collecting pole (5) is 10-200 mm. The voltage between the annular dust collecting pole (5) and the first and second parallel electric field negative plates is 30%-60% of the breakdown voltage under the local atmospheric humidity annual average humidity condition.

The pressure of the air compressor (23) is 0. 2- 1MP. The flow-type electrostatic precipitator according to claim 5 is characterized in that:

10. A power plant boiler dust removing device using the radial flow type electrostatic precipitator according to any one of claims 1-9, characterized in that it comprises: a radial flow type electrostatic precipitator and a bypass pipe (25), said radial flow type electric dust removal The airflow inlet (8) of the device is in communication with the exhaust duct of the power station boiler through a second intake pipe (26), and the airflow outlet (9) of the radial flow electrostatic precipitator is in communication with the third exhaust pipe (27), a bypass pipe (25) is connected between the second intake pipe (26) and the third exhaust pipe (27), and the bypass pipe is located at the bypass pipe

(25) The second intake pipe (26) on the front side of the rear end is provided with a first valve (28), and the third exhaust pipe (27) located at the rear side of the front end of the bypass pipe (25) A second valve (29) is disposed thereon, and the bypass valve (25) is provided with a third valve (30).