KR100711477B1 - An apparatus for controlling dedust in a electric precipitator - Google Patents

Abstract

The present invention is to prevent dust from being scattered again when the dust attached to the dust collecting plate by the hammer device to increase the dust collection efficiency, the dust control device in the dry electrostatic precipitator to keep the air discharged to the outside always clean state It is about.

The present invention is a device for collecting and removing dust collected by hitting the dust collector plate of the electrostatic precipitator with a hammer, the passage between the dust collector plate 11 is rotated 90 ° at the inlet (4) side of the dust collector 1 A plurality of shielding plate 10 for opening and closing the; A driving unit 20 connected to the upper portions of the rotation shafts 15 of the shielding plates 10; Sensor unit including a sensor installed in the lower portion of the dust collector (1) to detect the impact of the hammers (17) and a sensor provided in the drive unit 20 to detect the rotational position of the shielding plate (10) 30; And a controller 40 for controlling the driving of the driving unit 20 and the hammer device 17 according to the signal from the sensor unit 30, and the shielding plates 10 by the control unit 40. It provides an anti-dust control device that is configured to automatically adjust the opening and closing of the dust to prevent the dust from scattering to the outside.

Electrostatic Precipitator, Dust Collector, Hammer, Dust, Shielding Plate

Description

AN APPARATUS FOR CONTROLLING DEDUST IN A ELECTRIC PRECIPITATOR}

1 is a perspective view of a portion of a conventional electrostatic precipitator;

2 is a partial perspective view showing a process gas flow of a conventional electrostatic precipitator;

3 is a perspective view of an electrostatic precipitator equipped with a dust removal control apparatus according to the present invention;

4 is an exploded perspective view showing an exploded exhaust control apparatus of FIG. 3;

FIG. 5 is a detailed view illustrating a sensor unit of the exhaust control apparatus of FIG. 3; FIG. And

6 is a control diagram showing a control flow of the dust removal control apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

 1 ... electrostatic precipitator 4 ... gas inlet

 5 ... Discharge device 6 ... Gas outlet

10 ... shielding plate 11 ... dust collecting plate

13 ... rotary arm 26 ... motor

27 ... cylinder 36 ... detection plate

37 ... limit sensor 100 ... dust removal control device according to the present invention

The present invention relates to a dust control device for an electrostatic precipitator, and more particularly, to prevent dust from being scattered again when the dust is attached to the dust collecting plate by a hammer device, thereby increasing dust collection efficiency, so that the air discharged to the outside is always The present invention relates to a dust removal control apparatus in an electrostatic precipitator for maintaining a clean state.

1 shows a conventional electrostatic precipitator and FIG. 2 shows the gas flow in the electrostatic precipitator.

In general, the electrostatic precipitator (1) performs a charging action of charging the particles using environmental pollutants such as dust discharged from the sintering ore manufacturing process using a high voltage, and a dust collecting plate having opposite polarities of the charged particulate pollutants. It attaches to (11) and collects environmental pollutants in particulate state.

Recently, in order to prevent reverse corona generated by particulate matter attached to the dust collecting plate 11, the dust collecting plate 11 and the discharge electrode 14 are enlarged and installed, and a relatively high voltage is applied to the discharge electrode 14. Therefore, a wide electrostatic precipitator for reducing installation costs and increasing the efficiency of the electrostatic precipitator 1 by reducing the number of discharge electrodes 14 and precipitators in the electrostatic precipitator 1 is widely used.

Conventional electrostatic precipitator (1) is a main body (7), as shown in Figure 1, the gas inlet (4) is formed on one side of the main body 7 and the contaminated air containing the environmental pollutants in the particulate state, A discharge device 5 that charges the polluted air passing through the gas inlet 4 by discharging a voltage, and the polluted air is electrically charged by being charged with a polarity opposite to that of the polluted air passed through the discharge device 5. The dust collecting plate 11 to collect the and the purified air passing through the dust collecting plate 11 is discharged to the outside of the main body 7 is composed of a discharge device (5) is provided with a power supply device ( The discharge electrode 14 which discharges the electric current applied from the figure is mounted.

In addition, a shaft 17a crossing the dust collecting plate 11 is disposed in front of the dust collecting plate 11, and a plurality of hammers 17 are helically attached to the shaft 17a to form a striking part.

In the conventional electrostatic precipitator 1 having the above configuration, it is necessary to periodically remove the dust collected in the plurality of dust collecting plates 11 in order to maintain smooth operation and high efficiency of dust collection at all times.

In general, when excessive dust is deposited on the dust collecting plate 11, spark flash is likely to occur, and the dust collecting rate is significantly reduced. Therefore, in order to prevent this, the hammers 17 hit the dust collecting plate 11 and drop dust collected on the dust collecting plate 11 by vibration at this time in the dust collecting unit (not shown) disposed below. After collection, it is discharged to the outside to remove dust periodically.

However, the conventional electrostatic precipitator 1 repeats charging and dedusting of particulate environmental pollutants in the flow of continuous gas, and dust deposited on the dust collecting plate 11 at the time of the impact by the hammer 17 is the electrostatic precipitator. (1) There is a problem that the polluted gas is discharged again even if the polluted gas passes through the electrostatic precipitator 1 because it is re-spread and discharged in the gas flowing continuously in the (1) and the dust collecting efficiency is reduced.                         

Therefore, a strong blow device such as a hammer 17 cannot be used for strong adhesion sintered dust. Accordingly, the dust deposition layer is increased on the dust collecting plate 11, and the dust collection efficiency is drastically reduced. As a result, there have been repeated problems such as suspension of operation for a long time, operation breakage, shortening of service life, and increasing maintenance costs.

Therefore, researches for actively peeling and removing dust adhered to the dust collecting plate 11 are being actively conducted, and the damper control device of the electrostatic precipitator of the present application number 1997-0074583 and the rotary type of the electrostatic precipitator of the application number 2000-0008876 Exhaust gas distribution devices are known. However, the former technology is a technology to control the dust concentration as a damper when the sintering machine is restarted after the sintering machine is stopped and can be used in a single facility, but there are many branch pipes in this continuous process. In the case of using at a place, it is possible to install a large number of the dust collector or to greatly expand the dust collecting chamber, which requires a huge cost. In addition, in the latter technique, it is essential to install a rotary gas distribution plate inside the dust collecting chamber, but there is a problem that a large amount of dust is contained in the exhaust gas when the blower is hit even when the gas distribution is even.

The present invention is to solve the conventional problems as described above, while using a strong blow force against strong sintered dust to prevent dust from being re-spread so that the air discharged to the outside is always kept in a clean state to improve the dust collection efficiency The purpose is to provide an electrostatic precipitator that is improved.

The present invention is a device for collecting and removing dust collected by hitting the dust collector plate of the electrostatic precipitator with hammers, in order to achieve the above object, the passage between the dust collector plate is rotated 90 ° at the inlet side of the dust collector A plurality of shielding plate for opening and closing the; A driving unit connected to upper portions of the rotation shafts of the shield plates; A sensor unit including sensors installed at a lower portion of the dust collector to detect a strike of the hammers and a sensor installed inside the driving unit to detect a rotational position of the shield plates; And a control unit for controlling driving of the driving unit and the hammer device in response to a signal from the sensor unit, and configured to automatically prevent opening and closing of the shielding plates by the control unit to prevent dust from scattering to the outside. By providing an anti-dust control device.

Hereinafter, the configuration of the dust control apparatus of the electrostatic precipitator according to the present invention will be described in more detail with reference to the drawings.

3 shows an electrostatic precipitator equipped with a dust removal control apparatus according to the present invention, FIG. 4 shows an exploded view of the dust removal control apparatus of FIG. 3, and FIG. 5 shows the sensor part of the exhaust emission control apparatus of FIG. 3 in detail.

3 and 4, the dust removal control apparatus 100 according to the present invention includes a plurality of shielding plates 10 corresponding to the length and spacing of the dust collecting plate 11 inside the body 7. . The shielding plates 10 are coupled to a central axis 15 disposed perpendicular to the gas inlet 4 side, and the central axis 15 is disposed at an upper base plate 19a disposed at an upper portion thereof and disposed at a lower portion thereof. The lower base plate 19b is rotatably coupled to the bearing 12, which is fixed to the bolt coupling device 52, respectively.

The shielding plates 10 are flat and have a rotary arm 13 inserted into the upper side of the central shaft 15 to be coupled to the central shaft 15 by bolts and nuts 51. On the side of the) is connected to the connecting table (13a) having a first hole (13b) inside.

The connecting rod 13a is coupled to the fixed arm 25 of the driving unit 20 to transmit the rotation driving force to the rotary arm 13. The fixing arm 25 has a second hole 25a therein and a coupling pin in a state where the first hole 13b of the connecting table 13a and the second hole 25a of the fixing arm 25 are aligned with each other. 53 is inserted to join the two members.

The cylinder 27 is fixedly coupled to the side of the fixed arm 25, the cylinder 27 is connected to the motor 26 is driven. Therefore, the cylinder 27 is driven by the driving of the motor 26, and accordingly, the rotary arm 13 is rotated via the fixed arm 25 and screwed to the rotary arm 13. The rotation of the shield plate 10 coupled with the central axis 15 is rotated.

Each of the shield plates 10 is coupled to the fixed arm 25, the cylinder 27 and the motor 26 to transmit a rotational driving force to the shield plate 10 as described above. Therefore, the drive unit 20 is composed of a plurality of motors 26, cylinders 27 and fixed arms 25.

A motor box (not shown) surrounding the motor 26 is equipped with a position detection sensor 38 for detecting a rotation state of the rotation shaft 26a of the motor 26. The position detection sensor 38 detects the opening and closing operation of the shield plate 10 by detecting the rotation signal of the motor 26. The position detection sensor 38 transmits a detection signal to the controller 40 not shown.

5 shows a sensor unit 30 of the dust removal detecting apparatus 100 according to the present invention.

The sensor unit 30 is installed on the outside of the electrostatic precipitator 1 and includes a plurality of detection plates 36 mounted on the rotating shaft 17a on which the hammer 17 is spirally mounted. The number of the detection plates 36 is the same number as the hammers 17 and is arranged spirally on the rotation shaft 17a similar to the spiral arrangement in which the hammers 17 are disposed on the rotation shaft 17a. do.

The detection plates 36 contact the limit sensors 37 corresponding to the rotation of the rotation shaft 17a. The limit sensors 37 are the same number as the number of the detection plates 36, and are arranged in a line in parallel with the rotation shaft 17a at positions spaced apart from the rotation shaft 17a and spirally rotate the rotation shaft 17a. When the detection plates 36 disposed in the are rotated, they are in contact with the detection plates 36 in turn. The detection signal detected by the limit sensors 37 is transmitted to the controller 40.

The detection plates 36 and the limit sensors 37 may be replaced by light emitters and light receiving sensors, respectively, and the hammers may be detected when the light receiving sensor detects light of a light emitter rotated according to the rotation of the rotation shaft 17a. (17) A configuration for recognizing each hit is also possible.

One side of the rotary shaft 17a is coupled to the drive motor 39 to receive the rotation driving force.

The signals detected from the position detection sensors 38 and the limit sensors 37 are transmitted to the controller 40 not shown. The controller 40 may be installed inside or outside the electrostatic precipitator 1 and may rotate the motors 26 and the hammers 17 to rotate the shielding plates 10 according to the detection signal. 39 controls the driving, and the result signal is transmitted to the worker through a display device installed outside.

Figure 6 shows the control flow of the control device of the dust removal control apparatus 100 according to the present invention.

Hereinafter, the operation of the dust elimination control device 100 according to the present invention.

Electrostatic precipitator (1) equipped with a dust removal control device 100 according to the present invention, when the operator operates the control device (not shown) in the cab in the sintered ore manufacturing process, the suction fan is first operated while introducing the polluted gas. The introduced polluted gas is charged by the corona discharge generated by the high voltage supplied to the discharge electrodes 14 and the dust collecting plates 11 in the electrostatic precipitator body 1, and thus the electrostatic force is applied to the dust collecting plate 11. Is collected.

When a large amount of dust is collected on the dust collecting plates 11, the striking part 60 is operated to drive the motor 39. At this time, the controller 40 is connected to the first motor 26a of the driving part 20. The second motor 26b is driven, and accordingly, the first shielding plate 10a and the second shielding plate 10b of the shielding plates 10 are rotated by 90 °, which corresponds to step a of FIG. 6.

The position detection sensors 38 connected to the rotary shafts of the first motor 26a and the second motor 26b respectively detect the rotation of the rotary shaft and transmit the rotation to the controller 40, and the controller 40 according to the signal. ) Stops the driving of the first and second motors 26a and 26b when the first and second shield plates 10a and 10b are rotated by 90 °.                     

When the shielding plates 10a and 10b are rotated to block the gas flow to the electrostatic precipitator 1, the rotation shaft 17a is rotated by the driving of the motor 39, and thus the rotation shaft 17a is rotated. The spirally arranged hammers 17 are rotated to strike the dust collecting plates 11.

At this time, the first hammer 17a (that is, the hammer disposed on the rightmost side of the hammers 17) of the hammers 17 is the first dust collecting plate 11a of the dust collecting plates 11 (that is, the When hitting the dust collecting plate 11a disposed on the rightmost side of the dust collecting plates 11, at the same time, the first detection plate 36a of the detection plates 36 disposed on the rotary shaft 17a causes the limit sensors ( It contacts with the 1st limit sensor 37a in 37, and this corresponds to step b of FIG. If the detection plate 36a and the limit sensor 37 are replaced with a light emitter and a light receiving sensor, the light of the light emitter is detected by the light receiving sensor.

The first limit sensor 37a transmits the contact signal to the controller 40 by the contact by the detection plate 36a, and the shielding plates 10a and 10b stop the gas flow for a predetermined time. It remains blocked and corresponds to step c of FIG. 6.

That is, the first dust collecting plate 11a is vibrated by the hit of the hammer 17a, and dust collected in the first dust collecting plate 11a is scattered and dropped and collected in the dust collecting unit disposed below. At this time, the gas flow into the electrostatic precipitator 1 is stopped and the gas flow outside the electrostatic precipitator 1 is also interrupted to block the gas flow with scattered dust.

When a predetermined time elapses, the control unit 40 rotates the first motor 26a in reverse and rotates the third motor 26c forward so that the first shielding plate 10a is rotated in a 90 ° direction. Reverse rotation opens the passage to the electrostatic precipitator 1 and the third shielding plate 10c is rotated forward in the 90 ° direction to close the passage of the electrostatic precipitator 1, which corresponds to step d of FIG. 6. .

The position detection sensors 38 connected to the rotation shafts of the first motor 26a and the third motor 26c respectively detect the rotation of the rotation shaft and transmit the rotation to the controller 40, and the controller 40 according to the signal. ) Stops the driving of the first and third motors 26a and 26c when the first and third shielding plates 10a and 10c are rotated backward and forward by 90 °.

After that, the motor 39 continues to rotate so that the second hammer 17b strikes the second dust collecting plate 11b, and passages formed on both sides of the second dust collecting plate 11b for a predetermined time are closed. Scattered dust falls to the bottom and is collected in the dust collecting unit, which corresponds to step f of FIG.

The above series of operations are repeated until the last dust collecting plate 11 of the dust collecting plates 11 is hit so that dust collected in the dust collecting plates 11 of the electrostatic precipitator 1 is not scattered to the outside. All are collected in the dust collector located below.

In the series of operations, the predetermined time period after the hitting of the hammers 17 is completed is preferably set based on the cleanliness of the exhaust gas.

If the shield plate 10 stops operation for a predetermined time or if the position detection sensor 38 does not receive a detection signal for a period of time, the shield plate 10 may be artificially operated. When the operation of the electrostatic precipitator 1 is stopped, the control unit 40 may input a program in advance so that the rotation of the shield plate 10 may be automatically stopped.

As described above, according to the dust extraction control apparatus of the electrostatic precipitator, when dust is scattered from the dust collecting plates by the hammers, the dust shield is automatically operated by operating a shielding plate that automatically opens and closes the gas flow to the dust collector. It prevents the discharge to the outside has the effect of keeping the air discharged to the outside always clean.

In addition, according to the dust removal control apparatus of the electrostatic precipitator according to the present invention, since there is no need for a conventional internal homemade work, it is possible to suppress the occurrence of an operation holiday as much as possible, thereby improving the operation rate.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of Easily know.

Claims (4)

In the device for collecting and removing dust collected by hitting the dust collector plate of the electrostatic precipitator, A plurality of shield plates 10 which are reciprocated by 90 ° at an inlet 4 side of the dust collector 1 to open and close a passage between the dust collectors 11; A driving unit 20 connected to the upper portions of the rotation shafts 15 of the shielding plates 10; Sensor unit including a sensor installed in the lower portion of the dust collector (1) to detect the impact of the hammers (17) and a sensor provided in the drive unit 20 to detect the rotational position of the shielding plate (10) 30; And It includes a control unit 40 for controlling the driving of the drive unit 20 and the hammer device 17 according to the signal from the sensor unit 30, The dust control device, characterized in that configured to prevent the dust is scattered to the outside by automatically adjusting the opening and closing of the shielding plate (10) by the control unit (40). The method of claim 1, The upper portion of the rotating shafts 15 of the shielding plate 10 is mounted with a rotary arm 13 having a connecting table 13a having a first hole 13b therein. The drive unit 20 includes a cylinder 27 driven by a motor 26, the fixed arm 25 having a second hole 25a is attached to the side of the cylinder 27, The first hole (13b) is matched with the second hole (25a), the pin (53) is coupled to the dust removal control device, characterized in that the shield plate (10) is rotated by the drive of the motor (26). The method of claim 1, Sensors installed under the dust collector 1 of the sensor unit 30 are helically mounted on the shaft 17a by the same number corresponding to the helical arrangement in which the hammers 17 are mounted on the shaft 17a. As the limiting plates 37 arranged in parallel with the axis 17a at positions corresponding to the detection plates 36 and the respective detection plates 36 to detect contact signals with the detection plates 36, Sends the contact signal to the controller 40, The sensor in the driving unit (20) is a position detection sensor (38) which is connected to the rotary shaft of the motor (26) to send a rotation signal of the rotary shaft to the control unit (40). The method of claim 3, The detection plates 36 and limit sensors 37 installed under the dust collector 1 are replaced with light emitters and light receiving sensors, respectively, so that the light receiving sensor detects the light of the light emitters and detects the detection signal. Anti-dust control device characterized in that sent to.

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