JP2001246286A - Moving electrode type electric dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the setting cost for a driving mechanism of a brushing means in a moving electrode type electric dust collector. SOLUTION: This moving electrode type electric dust collector is provided with a number of discharge frames 14 suspended in a case and a number of moving electrodes 15 with a plurality of dust collecting grids 32 wound on every other discharge frames 14, and the brushing means 40 for brushing the dust collecting grids 32 of respective moving electrodes 15 on given positions, and a plurality of adjoining brushing means 40 are driven by a common driving source, and the dust collecting grids 32 of respective electrodes corresponding to a plurality of brushing means 40 are provided with the phase difference, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable electrode type dust collector, and more particularly, to a plurality of discharge frames suspended at a predetermined interval in a casing, and the discharge frames are circulated every other one. The present invention relates to a moving electrode type electrostatic precipitator provided with a large number of moving electrodes.

[0002]

2. Description of the Related Art A moving electrode type dust collector of this type is known as a dust collector for removing dust in boiler exhaust gas from a thermal power plant and exhaust gas from various furnaces for steelmaking. The schematic structure will be described with reference to FIGS.

[0003] In FIG. 6, a moving electrode type electrostatic precipitator 1 is shown.
Reference numeral 0 denotes a casing 12, a hopper 13 below the casing 12, and a number of discharge frames 14 and a number of moving electrodes 15 disposed in the casing 12. The exhaust gas 17 introduced into the exhaust gas is removed by the principle of electric dust collection and discharged from an outlet flue 18. The collected dust falls into the hopper 13 and is discharged from the discharge port 2 by a mechanism (not shown).
Take from 0.

FIG. 7 is a view taken in the direction of arrows AA in FIG. 6, in which a large number of discharge frames 14 are suspended at predetermined intervals in a casing 12 from a insulator 22 shown in FIG. Is suspended through. In addition, a large number of moving electrodes 15 are provided so as to circulate every other discharge frame 14.

FIG. 8 is a perspective view showing the structure of the moving electrode 15. A pair of endless chains 30, 30 are stretched between an upper driving wheel 26 and a lower roller 28. A plurality of dust collecting electrode plates 32 are suspended from the chains 30, 30 by being locked at the position of the intermediate portion 33 in the width direction, and form a loop as a whole. The drive shaft 34 of the drive wheel 26 is rotated by a drive mechanism (not shown), and the rotation of the drive shaft 34 causes the pair of endless chains 30, 3 meshing with the drive wheel 26 to rotate.
0, and the plurality of dust collecting electrode plates 32 forming the loop move around every other discharge frame 14.

FIG. 9 is a layout view of the lower part of the movable electrode 15,
The dust collecting electrode plate 32 suspended by the endless chain 30 and descending makes a U-turn at the position of the lower roller 28, and starts ascending.
A pair of rotating brushes 36 and 38 (hereinafter, this pair of rotating brushes is collectively referred to as a brush means and is denoted by reference numeral 40) is located at a position sandwiching the dust collecting electrode plate 32 immediately after the rising.
5 for each lane. The brushes 36 and 38 are made by implanting metal brushes on the rotating shafts. The brush 36 is turned clockwise and the brush 38 is turned counterclockwise so as to blow down dust adhering to the surface of the dust collecting electrode plate 32 downward. Rotate around. The dust collecting electrode plate 32 from which dust adhered to the surface has been removed by the brush means 40 rises sequentially, and the discharge frame 14
In a certain discharge region, the dust in the exhaust gas is collected on the surface by the principle of electric dust collection and descends again.

[0007]

In the case where the moving electrode 15 is a relatively large-scale device, the moving electrode 15
Are 50 to 100 lanes, and these moving electrodes 1
5, the same number of driving devices as those for driving the brush means 40 and the number of driving devices for the brush means 40 are required.

An object of the present invention is to provide a movable electrode type electrostatic precipitator capable of improving the above-mentioned problems of the prior art and reducing the installation cost of a drive mechanism for these moving electrodes and brush means. is there.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a plurality of discharge frames suspended at predetermined intervals in a casing and a plurality of discharge frames suspended on a pair of endless chains. Forming a loop as a whole with the collecting electrode plates of the present invention, the collecting electrode plate circling around every other discharge frame, and a plurality of moving electrodes, and the collecting electrode circulating at a fixed position for each moving electrode. In a movable electrode type electrostatic precipitator provided with brush means for brushing a plate, a plurality of adjacent brush means are driven by a common drive source, and a dust collecting electrode plate of each movable electrode corresponding to the plurality of brush means. Has a phase difference with the dust collecting electrode plate of at least one other moving electrode.

In order to achieve the above object, the present invention is characterized in that, in addition to the above features, a plurality of moving electrodes corresponding to the plurality of brush means are driven by a common driving source. I do.

[0011]

FIG. 1 is a layout diagram of a lower part of a moving electrode according to an embodiment of the present invention. The overall configuration of the movable electrode type electrostatic precipitator is the same as that described in the section of the related art, and the components denoted by the same reference numerals as above denote the same components.

In FIG. 1, the moving electrodes 15A, 1
In 5B and 15C, the dust collecting electrode plates 32A, 32B and 32C suspended by the endless chain 30 and descending are attached to the lower roller 28.
Makes a U-turn at the position and starts to rise. Brush means 40A, 40B, 40C are arranged at positions sandwiching the dust collecting plates 32A, 32B, 32C immediately after the ascending.
A pair of brushes 36A, 38 constituting the brush means 40A
A rotates in the direction shown in the drawing so as to sweep down dust attached to the surface of the dust collecting electrode plate 32A downward. Brush means 4
The same applies to 0B and 40C.

These brush means 40A, 40B, 40
C is driven by a common drive source as shown in FIGS. That is, the rotation shaft of each brush penetrates the wall material 21 of the casing, and the end of the rotation shaft is a bearing 41 outside the casing.
It is supported by. The rotating shaft 42A of the brush 36A has a gear 46A and a sprocket 50A, the rotating shaft 44A of the brush 38A has a gear 48A, and the rotating shaft 42 of the brush 36B.
B includes a gear 46B and a sprocket 50B, and a brush 38B.
B has a gear 48B and a sprocket 52B
However, a sprocket 50 is attached to the rotating shaft 42C of the brush 36C.
C has a sprocket 5 on the rotating shaft 44C of the brush 38C.
1C and a sprocket 52C are respectively attached.

Further, as shown in FIG.
Is provided with a brush means 40D, and a rotating shaft 42D of the brush 36D is provided with a gear 46D and a sprocket 50D.
A gear 48D and a sprocket 52D are attached to a rotating shaft 44D of the brush 38D. A sprocket 58 is attached to the rotation shaft 62 of the drive source 60.

In the above configuration, the sprockets 58,
The sprocket 50C, the sprocket 51C, and the sprocket 50D are connected by a chain 64. When the rotation shaft 62 of the drive source 60 rotates clockwise, the rotational force is transmitted from the sprocket 58 to each sprocket via the chain 64. , Rotating shaft 42C, 42
D rotates clockwise, and the rotating shaft 44C rotates counterclockwise. The sprocket 52C and the sprocket 52
Since B is connected by the chain 66, the rotation shaft 44B rotates counterclockwise with the rotation of the rotation shaft 44C. Further, since the gear 46B and the gear 48B mesh with each other, the rotation shaft 42B rotates clockwise with the rotation of the rotation shaft 44B. Hereinafter, by transmitting the same rotational force, the rotating shaft 42A rotates clockwise and the rotating shaft 44A rotates counterclockwise.

Further, by the rotation of the rotation shaft 42D,
The rotating force is transmitted to the rotating shaft 44D via the gears 46D and 48D.
To communicate. Hereinafter, an adjacent rotation shaft (not shown) also rotates by transmitting the same rotation force.

As a result, a plurality of adjacent brush means 40 are provided.
Can be driven by the common drive source 60.
In the present embodiment, the drive source 60 is disposed at the center, and a total of six brush means 40 are driven by the common drive source 60, three on each side. By applying the same structure to other brush means, the number of moving electrodes 15 can be reduced to 60.
In the moving electrode type electrostatic precipitator of the lane, all the brush means can be driven by ten driving sources, which greatly contributes to simplification of the driving device. In this embodiment, the plurality of adjacent brush units are driven by the common drive source as described above, and the plurality of moving electrodes corresponding to the plurality of brush units are also shared by the same mechanism as described above. It is driven by a driving source, which greatly contributes to simplification of the driving device.

In this embodiment, in addition to the above-mentioned features, the dust collecting electrode plate of each moving electrode corresponding to the plurality of adjacent brush means has a phase difference from the dust collecting electrode plates of the other moving electrodes. Driven. That is, with reference to the phase of the dust collecting electrode plate 32A of the moving electrode 15A in FIG. 1, the dust collecting electrode plate 32B of the moving electrode 15B is driven with a phase difference of 30 ° delay, and the dust collecting electrode 32C of the moving electrode 15C is driven. The electrode plate 32C is driven with a phase difference of 60 ° delay. Hereinafter, similarly, the common driving source 6
The dust collecting electrode plates 32 of the moving electrode 15 of 6 lanes corresponding to a plurality of brush means driven by 0, 0 °, 30 °, 6 °
It is driven with a phase difference every 30 ° in the order of 0 °, 90 °, 120 °, 150 °.

The reason why the phase difference is provided for driving the dust collecting electrode plate 32 as described above is that the outer shape of the dust collecting electrode plate 32 is closely related. That is, as shown in FIG. 4, the dust collecting electrode plate 32 has a structure in which the periphery of a thin steel plate 72 is reinforced by a relatively thick vertical frame 74 and a horizontal frame 76 mainly for the purpose of weight reduction and strength. It is said.

For this reason, when the dust collecting electrode plate 32 passes between a pair of brushes 36 and 38 arranged at a fixed position as shown in FIG. Relatively little deformation of the brush 78, the brush 36,
38 is small in rotational torque. Further, since the pressing force of the brush against the steel plate 72 is small, the steel plate 72 is
The passing resistance when passing through 0 is also small. On the other hand, in the portion of the horizontal frame 76 shown in (b), the deformation of the brush 78 of the brush is large, and the rotational torque of the brushes 36 and 38 is large. Further, since the pressing force of the brush against the horizontal frame 76 is large, the passage resistance when the horizontal frame 76 passes through the brush means 40 also increases. In one trial calculation example, the horizontal frame 76 is
And the rotational torque required for the brush means 40 are about twice that of the steel plate 72.

Therefore, the plurality of movable electrodes 15 and the plurality of brush means 40 are commonly used in a state where the dust collecting electrode plates 32 of the plurality of adjacent movable electrodes 15 have no phase difference with each other as shown in FIG. When driven by the driving source of the brush unit 4, the horizontal frames 76 of the plurality of
0 at the same time, and the load on the common drive source and transmission mechanism at this time increases. For this reason, a common drive source and a transmission mechanism must be provided so as to withstand a temporary large load, which leads to an increase in equipment cost.

On the other hand, in the present embodiment, as shown in FIG. 1, since the dust collecting electrode plates 32 of the adjacent moving electrodes 15 have a phase difference from each other, the moving electrodes 15 and the When the brush means 40 is driven by a common driving source, the horizontal frames 76 of the plurality of dust collecting electrode plates 32
0 at the same time, and the load on the common drive source and the transmission mechanism is averaged. For this reason, the capacity and strength of the common drive source and the transmission mechanism can be reduced, and equipment costs can be reduced.

In the above embodiment, a plurality of adjacent brush means are driven by a common drive source, and a plurality of moving electrodes corresponding to the plurality of brush means are driven by a common drive source by a similar mechanism. I tried to make it. However, the present invention is not limited to this. For example, the common driving source of the brush means is set to six moving electrode lanes,
The brush means and the moving electrode may be driven by a common driving source in different combinations so that the common driving source for the moving electrode is for three lanes. Alternatively, only the brush means may be driven by a common driving source, and the moving electrode may use an individual driving source for each lane.

In the above embodiment, the dust collecting electrode plates of adjacent moving electrodes have a phase difference of 30 °. However, the present invention is not limited to this, and the dust collecting electrode plate of each moving electrode corresponding to a plurality of brush means driven by a common driving source has a phase difference with the dust collecting electrode plate of at least one other moving electrode. I just need. For example, when the brush means driven by the common drive source corresponds to six moving electrode lanes, when the dust collecting electrode plates of each moving electrode corresponding to a plurality of brush means have a phase difference by the following combination. Are included in the present invention, and the effects of the present invention can be enjoyed. Example 1: 0 °, 30 °, 60 °, 0 °, 30 °, 60 ° Example 2: 0 °, 0 °, 90 °, 90 °, 180 °, 180 ° Example 3: 0 °, 90 °, 0 ° °, 90 °, 0 °, 90 °

[0025]

According to the moving electrode type electrostatic precipitator according to the present invention, the installation cost of the driving mechanism of the brush means can be reduced. Also, the installation cost of the driving mechanism for the moving electrode can be reduced.

[Brief description of the drawings]

FIG. 1 is a layout diagram of a lower part of a moving electrode according to an embodiment of the present invention.

FIG. 2 is a plan sectional view showing a driving mechanism of a brush unit according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a driving mechanism of a brush unit according to the embodiment of the present invention.

FIG. 4 is a perspective view showing a structure of a dust collecting electrode according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an operation state of the brush means according to the embodiment of the present invention.

FIG. 6 is a side sectional view showing a general configuration of a moving electrode type electrostatic precipitator.

FIG. 7 is a view taken in the direction of arrows AA in FIG. 6;

FIG. 8 is a perspective view showing a general structure of a moving electrode.

FIG. 9 is a layout diagram of a general lower portion of a moving electrode.

[Explanation of symbols]

 12 Casing 14 Discharge frame 15 Moving electrode 26 Drive wheel 30 Endless chain 32 Dust collecting electrode plate 40 Brush means 60 Drive source

Claims (2)

[Claims] A plurality of discharge frames suspended at predetermined intervals in a casing, and a plurality of dust collecting electrode plates suspended from a pair of endless chains to form a loop as a whole; A moving electrode type electrostatic precipitator comprising: a large number of moving electrodes whose electrodes circulate every other discharge frame; and brush means for brushing the circulating dust collecting plate at a fixed position for each of these moving electrodes. In the apparatus, a plurality of adjacent brush means are driven by a common drive source, and a dust collecting electrode plate of each moving electrode corresponding to the plurality of brush means has a phase difference with a dust collecting electrode plate of at least one other moving electrode. A moving electrode type electrostatic precipitator, comprising: 2. The moving electrode type electrostatic precipitator according to claim 1, wherein a plurality of moving electrodes corresponding to the plurality of brush means are driven by a common driving source.