JP3413535B2 - Electric dust collector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic precipitator, and more particularly to an electrostatic precipitator capable of adjusting the efficiency of collecting a processing gas containing dust.

[0002]

2. Description of the Related Art In an electrostatic precipitator, when a high voltage is applied between a discharge electrode and a dust collecting member, a corona discharge is generated between both parts to form a charge band, and the charge band is processed. The dust contained in the processing gas is charged by flowing the gas, and the charged dust is attracted to and collected by the dust collecting member having the opposite potential.

FIG. 7 is a cutaway plan view showing an example of a conventional electrostatic precipitator, and FIG. 8 is a view taken in the direction of arrows VIII-VIII in FIG. 7, in which a treated gas 1 containing dust is guided in an arrow direction. A casing 4 having a gas inflow duct 2 and a gas exhaust duct 3, and a plate having a mesh-like or discrete wire-like or barb-like protruding portion located in the casing 4 and arranged in parallel with the flow direction of the processing gas 1. Discharge electrode 5 consisting of objects
And a dust collecting member 6 having a mesh shape or a perforated plate and arranged in parallel with the discharge electrode 5 are suspended and supported by a suspending member 7 to form a main part of the electrostatic precipitator 8. I am trying.

Since the discharge electrode 5 and the dust collecting member 6 are arranged in parallel with the flow direction of the processing gas 1 in the electrostatic precipitator 8 having the above structure, the charged powder in the processing gas 1 is There is a problem in that the dust collecting member 6 easily passes and flows without being sucked, so that it is difficult to increase the dust collecting efficiency, and thus the electric dust collecting device 8 becomes large.

Therefore, in recent years, as shown in FIG.
An electrostatic precipitator 9 having a structure in which the discharge electrode 5 and the dust collecting member 6 having the permeation structure of the processing gas 1 as described above are arranged in the casing 4 in a direction intersecting with the flowing direction of the processing gas 1.
Is being considered.

According to this electrostatic precipitator 9, since the discharge electrode 5 and the dust collecting member 6 are arranged in the direction intersecting with the processing gas 1 flowing in the casing 4, dust from the discharge electrode 5 is prevented. By increasing the chances of printing and suctioning dust to the dust collecting member 6, the action of passing dust as in the case of FIGS. 7 and 8 is reduced, and the dust collecting efficiency is significantly increased. be able to.

[0007]

However, in the conventional electrostatic precipitators 8 and 9 described above, the dust collection efficiency is substantially determined by the size of the mutual spacing between the discharge electrode 5 and the dust collecting member 6. ing. That is, the dust collection efficiency is proportional to the strength of the electric field (electric field density), and at the same electric field density, the dust collection efficiency increases as the particle size of the dust increases. When the distance from the member 6 is made small, the electric field density can be rapidly increased at the same voltage and the dust collection efficiency can be greatly increased. Since the mutual distance between the dust collecting member 6 and the dust collecting member 6 is fixed, the dust collecting efficiency cannot be changed by changing the mutual distance between the discharge electrode 5 and the dust collecting member 6.

For this reason, when the dust collection efficiency is lowered by using the electric dust collectors 8 and 9, or when it becomes necessary to remove even the dust having a particle diameter smaller than that in the initial design stage, the load is reduced. It is conceivable to increase the discharge voltage to increase the electric field density of the discharge, but there is a limit to increase the voltage, and therefore it is necessary to newly install a power supply device with a large capacity and switch the power supply device. When the high voltage is applied as described above, there is a problem that the power consumption is significantly increased.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electrostatic precipitator capable of arbitrarily adjusting the precipitating efficiency without changing the voltage.

[0010]

Means for Solving the Problems The present invention includes a casing for guiding the process gas that contains dust, a discharge electrode arranged so as to cross the flow direction of the process gas while located in the casing, the a transmission structure of the processing gas while located in the casing so as to be parallel to the discharge electrode
An electric dust collector having a dust collecting member arranged ,
Parallel to the support rail and flow direction of the process gas in the casing is provided, the mutual distance of each move in the flow direction of the process gas for the support rail discharge electrode and the dust collecting member of the discharge electrode and the dust collecting member adjustably supported by an electrostatic precipitator, characterized in that the, and, positions for moving the casing from the outside along the discharge electrode and the dust collecting member to the support rail
A position adjusting port is provided, and the position adjusting port is a detachable seal.
The present invention relates to an electrostatic precipitator which is closed by a cover or a lid .

[0011]

According to the invention of claim 1, the electric field density is changed by adjusting the distance between the discharge electrode and the dust collecting member, and the dust collecting efficiency can be changed without changing the voltage.

According to the second aspect of the present invention, since the casing is provided with the position adjusting port which can be opened and closed for adjusting the positions of the discharge electrode supported by the support rail and the dust collecting member, the position adjusting port is used. Thus, the distance between the discharge electrode and the dust collecting member can be easily adjusted from the outside of the casing.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of the present invention applied to the apparatus shown in FIG. 9, in which a gas inflow duct 2 for guiding a processing gas 1 containing dust is provided on one side, and A casing 4 having a gas discharge duct 3 on the other side is provided, and support rails 10 and 11 parallel to the flow direction of the processing gas 1 are provided at upper and left positions inside the casing 4.

On the support rails 10 and 11, as shown in FIG. 2, a discharge electrode support beam 13 traveling along the support rails 10 and 11 is passed over wheels 12, and the discharge electrode support beam 13 is A suspending member 15 is attached via an insulating material 14, and the discharge electrode 5 is suspended and supported on the suspending member 15 so as to intersect with the flow direction of the processing gas 1. The discharge electrode 5 has a structure in which a discrete wire 5b is arranged in a frame 5a.

In addition, on the support rails 10 and 11, as shown in FIG.
As shown in FIG. 3, the dust collecting member supporting beam 16 is bridged, and the mesh-like dust collecting member 6 is suspended and supported in parallel with the discharge electrode 5 via the suspending member 17 on the dust collecting member supporting beam 16. The discharge electrodes 5 and the dust collecting members 6 are alternately arranged as shown in FIG.

The discharge electrode supporting beam 13 and the dust collecting member supporting beam 16 are provided with moving handles 18 and 19 which extend upward and penetrate the upper plate of the casing 4, and the moving handles 18 and 19 penetrate therethrough. A slit-shaped position adjusting port 2 parallel to the supporting rails 10 and 11 is provided at the casing 4 position.
0 and 21 are formed, and seal covers 22 and 23 are detachably attached to the upper portions of the position adjusting ports 20 and 21.

In the figure, 24 is a hopper formed at the lower part of the casing 4 for taking out dust, and 25 is a crank mechanism driven by a motor provided outside the casing 4 or a hammer or the like through a hammer striking rod 26. Discharge electrode 5
And a vibrating device for vibrating the dust collecting member 6 to remove dust adhering to the discharge electrode 5 and the dust collecting member 6, and 27 is a casing for the hammering rod 26 of the vibrating device 25 provided corresponding to the discharge electrode 5. It is an insulating material provided in the 4 penetration part.

FIG. 5 shows an example of the vibrating device 25 provided on the discharge electrode 5 or the dust collecting member 6, and the hammering rod 26 fixed to the discharge electrode 5 and the dust collecting member 6 is discharged to the casing 4. It penetrates through a slit-shaped opening 30 formed in parallel with the moving direction of the electrode 5 and the dust collecting member 6, and projects outside the casing 4. A collar portion 31 is integrally formed at the tip of the hammering rod 26, and a spring 32 is provided between the collar portion 31 and the outer surface of the casing 4. For this reason, the hammering rod 26 is attached to the casing 4 by the spring 32.
The collar portion 31 is pressed against the hammering cam 33 by being urged in a direction projecting from.

The hammering cam 33 is fixed to the rotating shaft 34 by means of screws 35, and when the hammering cam 33 rotates clockwise together with the rotating shaft 34, the portion of the hammering cam 33 which comes into contact with the collar portion 31 gradually becomes. The diameter is increased, and the collar portion 31, the hammer rod 26, the discharge electrode 5, or the dust collecting member 6 is moved integrally toward the inside of the casing 4 against the force of the spring 32.

When the hammering cam 33 continues to rotate further clockwise, the portion of the hammering cam 33 which comes into contact with the collar portion 31 suddenly has a small diameter, so that the collar portion 31, the hammering rod 26,
The discharge electrode 5 or the dust collecting member 6 rapidly moves in the direction of protruding from the casing 4 by the force of the spring 32.
As the hammering cam 33 continues to rotate, the discharge electrode 5
Alternatively, the dust collecting member 6 will be vibrated left and right.

When the position of the hammering rod 26 is moved by the movement of the discharge electrode 5 and the dust collecting member 6, the screw 35 is loosened and the position of the hammering cam 33 is changed correspondingly. Reference numeral 36 in the figure denotes a cover. The vibration device 25 attached to the discharge electrode 5 is insulated from the casing 4 by an insulating material 27 or the like so as not to short-circuit.

Next, the operation of the above embodiment will be described.

In the electrostatic precipitator of FIGS. 1 to 4, when the electric field density between the discharge electrode 5 and the dust collecting member 6 is increased to improve the dust removal efficiency, the operation of the electrostatic precipitator is stopped. After the power supply is stopped, the seal covers 22 and 23 are removed, the moving handle 18 is grasped, and the discharge electrode 5 is fixed to the discharge electrode support beam 13.
Along with the support rails 10 and 11 via the wheels 12, it is moved along the support rails 10 and 11 via the wheels 12, and the moving handle 19 is gripped to hold the dust collecting member 6 together with the dust collecting member support beam 16. The distance between the discharge electrode 5 and the dust collecting member 6 is adjusted by moving the discharge electrode 5 and the dust collecting member 6. afterwards,
After attaching the seal covers 22 and 23 to the casing 4,
Start the electrostatic precipitator again.

As described above, in the electrostatic precipitator in which the distance between the discharge electrode 5 and the dust collecting member 6 is adjusted, the electric field density due to the discharge between the discharge electrode 5 and the dust collecting member 6 changes, Therefore, the dust collection efficiency can be changed even at the same voltage.

Further, as described above, the discharge electrode 5 and the dust collecting member 6
Since the mutual distance between the two can be adjusted from the outside of the casing 4, the dust collection efficiency can be easily changed. As a method of adjusting the mutual distance between the discharge electrode 5 and the dust collecting member 6, a method of adjusting all the mutual distances to be the same, or the larger the particle size of the dust of the processing gas 1, the more the dust is collected. Since it becomes easier to collect dust as the particle size becomes smaller, it is necessary to reduce the distance between the upstream side where the large particle size dust is mainly removed and the downstream side where the small particle size dust is removed. It is possible to adopt any method such as adjusting

FIG. 6 shows another embodiment of the present invention, showing the same parts as in FIG. 2 as an example. On the support rails 10 and 11 provided in the casing 4, a discharge electrode support beam 13 that travels along the support rails 10 and 11 is bridged via wheels 12, and the discharge electrode support beam 13 is interposed with an insulating material 14. The hanging material 15 by attaching the hanging material 1
5, the discharge electrode 5 is suspended and supported so as to intersect the flow direction of the processing gas 1.

In the above structure, the support rail 1 is provided on the side of the support rails 10 and 11 in the casing 4.
The discharge electrode 5 and the dust collecting member 6 for 0, 11 are treated gas 1
A position adjusting port 29 having a lid 28 for adjusting the position in the flow direction is provided.

In the above embodiment, when the electric field density between the discharge electrode 5 and the dust collecting member 6 is changed to change the dust removing efficiency, the operation of the electrostatic precipitator is stopped and then the lid 28 is closed. By removing and moving the discharge electrode support beam 13 and the dust collecting member support beam 16 from the position adjusting port 29 along the support rails 10 and 11, the mutual distance between the discharge electrode 5 and the dust collecting member 6 is adjusted. When the adjustment is completed, the lid 28 is attached to close the position adjusting port 29, and then the electrostatic precipitator is restarted. In the electrostatic precipitator in which the mutual distance between the discharge electrode 5 and the dust collecting member 6 is adjusted, the electric field density due to the discharge between the discharge electrode 5 and the dust collecting member 6 is changed, so that the dust is collected even at the same voltage. The efficiency has changed.

In the above embodiment, the case where the discharge electrode and the dust collecting member are suspended and supported by the support rail is shown. However, the support rail is provided at the lower part to support or the support rail is vertically moved. It may be provided and supported up and down, the discharge electrode may have a shape other than the discrete wire electrode wire, and the dust collecting member may have a shape other than the mesh shape, and other deviations from the gist of the present invention It goes without saying that various changes can be made within the range not covered.

[0031]

According to the first aspect of the invention, since the electric field density is changed by adjusting the distance between the discharge electrode and the dust collecting member, the dust collecting efficiency can be arbitrarily changed without changing the voltage. be able to.

According to the second aspect of the invention, since the casing is provided with the position adjusting port for adjusting the positions of the discharge electrode and the dust collecting member movably supported along the support rail, the position adjusting port allows the position adjusting port to be adjusted. The distance between the discharge electrode and the dust collecting member can be easily adjusted from the outside of the casing.

[Brief description of drawings]

FIG. 1 is a cut side view showing an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a view on arrow III-III in FIG. 1.

FIG. 4 is a partial detailed view of FIG.

FIG. 5 is a front view showing an example of a vibration device.

FIG. 6 is a cut front view of the same position as FIG. 2 showing another embodiment of the present invention.

FIG. 7 is a cut plan view showing an example of a conventional electrostatic precipitator.

FIG. 8 is a view on arrow VIII-VIII in FIG. 7.

FIG. 9 is a cut side view showing another example of a conventional electrostatic precipitator.

[Explanation of symbols]

1 Processing gas 4 casing 5 discharge electrodes 6 Dust collector 10 Support rail 11 Support rail 20 Position adjustment port 21 Position adjustment port 29 Position adjustment port

Continuation of the front page (72) Inventor Nobuyuki Abe 3-2-16 Toyosu, Koto-ku, Tokyo Ishikawa Shima Harima Heavy Industries, Ltd. Toyosu General Office (56) Reference JP-A-63-171655 (JP, A) Special Open 54-124378 (JP, A) Open 60-21341 (JP, U) Open 61-139750 (JP, U) Open Flat 2-125750 (JP, U) JP46-5519 ( JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B03C 3/00-3/88

Claims (2)

(57) [Claims] And 1. A casing for guiding the process gas that contains dust, a discharge electrode arranged so as to cross the flow direction of the process gas while located in the casing, said Keshi
And a dust collecting member that is located inside the container and has a processing gas permeation structure and that is arranged parallel to the discharge electrode.
E was an electrostatic precipitator, a parallel support rails and the direction of flow of the process gas in the casing is provided, to move each of the discharge electrode and the dust collecting member in the direction of flow of the process gas relative to the support rail release An electrostatic precipitator in which the mutual distance between the electrode and the dust collecting member is adjustable. 2. A position adjusting port for moving the discharge electrode and the dust collecting member from the outside along the support rail in the casing.
The position adjusting port is equipped with a removable seal cover or
The electrostatic precipitator according to claim 1, wherein the electrostatic precipitator is closed with a lid or a lid .