JP3243998B2 - Hanging installation method of electrode plate for electric precipitator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for suspending and mounting an electrode plate for an electrostatic precipitator, and more particularly, to assembling a single precipitating electrode plate by arranging a plurality of elements. The present invention relates to a method of suspending an electrode plate for an electrostatic precipitator for suspending in a casing of a device and vertically installing a large number of them in parallel.

[0002]

2. Description of the Related Art A schematic structure of an electric dust collector will be described with reference to FIGS. An inlet flue 2 is connected to one end side of the casing 1 surrounding the entire apparatus, and an outlet flue 3 is connected to the other end side. The dust-containing gas supplied from the inlet flue 2 into the casing 1 is discharged to the outlet. It forms a gas flow towards the flue 3. In the casing 1, a plate-shaped dust collecting electrode plate 4 is vertically extended by about 300 mm in a direction orthogonal to the gas flow.
And a large number of these dust collecting electrode plates 4
The discharge electrode frame 5 is disposed between the electrodes. The discharge electrode frame 5 is suspended from an insulator 7 provided on the upper part of the casing and connected to a power supply 8. Then, a DC voltage is applied from the power supply 8 to the discharge electrode frame, and corona discharge is generated between the discharge electrode frame 5 and the dust collecting electrode plate 4. Thus, dust in the dust-containing gas flowing between the discharge electrode frame 5 and the dust collecting electrode plate 4 is collected on the dust collecting electrode plate 4. The dust collected by the dust collecting electrode plate 4 falls and accumulates on a hopper 6 provided at a lower portion of the casing 1 and is discharged out of the casing 1 as appropriate.

In the construction of the electric precipitator, enormous man-hours are required for assembling and installing the precipitating electrode plate 4 and the discharge electrode frame 5, which greatly affects the construction process. For example, in a large-sized electric dust collector for boiler exhaust gas of a 1,000,000 KW thermal power plant, the number of attached dust collecting electrode plates 4 reaches about 1,000. The size of one dust collecting electrode plate 4 is about 4.5 m in width and about 15 m in height, and the weight is several hundred kg.

Conventionally, in a large-sized electrostatic precipitator of this type, elements (for example, eight pieces), which are components of an electrode plate, are suspended in the casing 1 from an opening provided in the upper part of the casing 1 by a crane. In this case, a hanging installation method for assembling and installing the dust collecting electrode plate 4 has been performed. However, in this method, when the number of the dust collecting electrode plates 4 is 1,000, the element only needs to be suspended in the casing 1 and 8,000 times of suspending work is required. Further, the same number of discharge electrode frames 5 are not suspended. It required a lot of work days and labor. In addition, this method is susceptible to wind because the work is suspended from the ceiling opening of the casing 1,
There was a drawback that work was not possible on windy days.

[0005] In view of this, the applicant of the present invention uses the dust collecting electrode plate 4 assembled on an assembling pedestal on the ground at the construction stage in which at least a part of the bottom of the casing 1 is opened, and assembles the assembling pedestal with the assembled pedestal. Move to the position below the bottom opening, hang the binding body in the casing with a crane, and
And the horizontal hoisting method is carried over to the electric hoist.
942).

[0006]

However, the suspension installation method disclosed in Japanese Patent Publication No. 39994/1990 uses the dust collecting electrode plate 4 because the bottom of the casing 1 is used for suspension work.
If the hanging installation work is not completed, there is a disadvantage that the hopper mounting work at the lower part of the casing 1 cannot be performed. In addition, since only the electrode plate of the bundled body hung by the crane on the electric hoist arranged at the installation height of the dust collecting electrode plate 4 is inherited and laterally fed, the number of work steps is increased and the work efficiency is satisfactory. I couldn't do it.

Accordingly, the hanging installation method disclosed in Japanese Patent Publication No. 2-39942 cannot be said to be sufficient for further shortening the construction period of the electric precipitator. The present invention has been made in view of such circumstances, and minimizes the number of steps for suspending and installing an electrode plate, and enables another operation of constructing an electrostatic precipitator to be performed in parallel. An object of the present invention is to provide a suspended installation method of an electrode plate for an electrostatic precipitator, which can significantly shorten the construction period of the device.

[0008]

According to the present invention, in order to achieve the above object, the dust contained in the dust-containing gas supplied into the casing from one end side of the casing is collected by an electrode plate and the other end of the casing is collected. An electric precipitator that exhausts from an end side surface and stores collected dust in a hopper provided at a lower part of a casing, wherein the electric precipitator is installed in a predetermined installation position by hanging a number of electrode plates in the casing. In the hanging installation method of the electrode plate, first, as a preparation, at least one of the side surfaces of the casing parallel to the flow of the dust-containing gas is opened, and the electrode plate is mounted on the ceiling of the casing. A rail for suspending / traversing means for suspending and laterally moving to an installation position is disposed such that one end of the rail extends out of the casing from the open portion. The above-mentioned electrode plate is assembled, and a binding body obtained by binding the assembly base and the electrode plate is moved to a position below the projecting portion of the rail, and then the binding body is movably supported by the rail. Hang-up to the upper end position of the open portion by the feed-in / horizontal-feeding means, and traverse to the installation position as it is, and then, after installing the electrode plate of the binding body at the installation position, Release the unity and suspend
The assembling stand is returned to the ground by moving and suspending the traversing means.

According to the present invention, at least one of the side surfaces of the casing parallel to the gas flow is opened without the necessity of mounting the hopper or engaging with the inlet or outlet flue, and providing the casing with a ceiling. A rail for suspending / traversing means for lifting the electrode plate and laterally moving it to the installation position is disposed so that one end of the rail extends from the opening to the outside of the casing. Then, in this state, a bound body is formed by binding the electrode plates assembled on the ground-based assembling base to the assembling base, and the bound body is moved to a position below the overhang of the rail, and is suspended and horizontally moved. The feeding means hangs the casing from the opening on the side surface of the casing into the casing and laterally feeds the casing. Thereby, even during the suspended installation work of the electrode plate, the work of attaching the hopper and the work of connecting the casing to the inlet or outlet flue can be performed in parallel.

[0010] Further, a notch is formed in a beam member forming an upper end of the open portion of the casing, and the rail is disposed so that the main body of the hanging / transporting means is accommodated in the notch. Thereby, the hanging margin (the distance from the upper edge of the binding body to the hanging position) of the binding body to be suspended by the suspending / lateral feeding means can be reduced. Can be performed in a stable state.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method for hanging and mounting an electrode plate for an electrostatic precipitator according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side view for explaining a suspended installation method of an electrode plate for an electrostatic precipitator of the present invention,
FIG. 2 is a front view. Note that the basic configuration of the electric precipitator has been described with reference to FIGS.

First, preparation for carrying out the hanging installation method of the present invention will be described. When the method of the present invention is performed when newly installing an electric dust collector, the electric dust collector 1
Of the side surfaces of the casing 12 surrounding the entire apparatus, the side surfaces not communicating with the inlet flue 14 and the outlet flue 16, that is, at least the side surfaces of the casing 12 parallel to the gas flow 18 of the dust-containing gas flowing in the casing. It is preferably performed at the construction stage, which has an opening 20 on one side.

Since the discharge electrode frame or the dust collecting electrode plate (hereinafter, referred to as an electrode plate) is easily deflected by a planar bending force and permanent deformation is generated by its own weight, the open portion 20 of the casing 12
It is necessary that the opening be large enough to carry the electrode plate in a vertical state. FIG. 1 shows a case where the electrode plates in the casing 12 are arranged in two rows, and two open portions 20 are formed in parallel.

A rail 24 made of H-shaped steel, which also serves as a ceiling frame of the casing 12, is provided from the center of the lower edge of the plate-like beam member 22 forming the upper end of the opening 20 toward the inside of the casing 12. The rail 24 is formed so that one end has an overhang portion 24 </ b> A projecting about 2 m from the open portion 20 to the outside of the casing 12, and the other end is extended to the opposite side of the casing 12. Is hanging
An electric chain block 26 serving as a lateral feed means is suspended so as to be able to run freely. The overhang 24A of the rail 24 is
While being supported by a support member 28 fixed to the casing 12, a stopper 29 is provided at the tip of the overhang portion 24A.
Is provided.

Referring to FIG. 3, the beam member 22, the rail 24
The relationship between the electric chain block 26 and the electric chain block 26 will be described in more detail. A notch 30 is formed at the center of the lower end edge of the beam member 22 in a gate shape. To fit the rail 24
Are arranged. That is, when the electric chain block 26 moves on the rail 24, the notch 30
To dive. A pair of suspension plates 35 for suspending the electrode plate 36 with U bolts are provided on the lower edge of the beam member 22 from the opening 20 side to the opposite side of the casing 12.
4 are arranged along.

The chain block 26 comprises a traveling device and a lifting device. In the traveling device, the pair of wheels 26B is H
It has a structure in which a steel rail 24 is sandwiched from both sides, and receives a radio signal from a separately provided transmitting device by a receiving device 26C, and is rotationally driven by a wheel motor built in the receiving device 26C. In addition, the lifting device includes a winding drum 26.
This is performed by winding or rewinding the wire 26E wound around D by the lifting motor 26F. A wire 26E having a length up to the ground is wound around a winding drum 26D, and a hook 26G is attached to a tip of the wire 26E. The electric chain block 26 includes a patrol light 31 with a buzzer for safety.

As shown in FIG. 1 and FIG. 2, the ground 3 on the side of the casing 12 where the opening 20 is provided is provided.
A ground rail 34 is laid on 2 along the casing 12 side surface. On the ground rail 34, an assembling base 38 having a carriage function and assembling the electrode plate 36 thereon is movably mounted. After performing the above preparations, the electrode plate 3
6 is installed by the following procedure. The operation of mounting the hopper 42 indicated by the two-dot chain line is performed in parallel with the operation of suspending and installing the electrode plate 36.

First, after assembling the electrode plate 36 on the assembling base 38, the electrode plate 36 is bound to the assembling base 38 with a binding member such as a bolt and a nut. I do. Next, the assembling pedestal 38 is run on the ground rail 34 by human power or a traction device, and
0 is moved to a position below the overhang portion 24A of the rail 24 overhanging from the open portion 20 of the casing 12. Then, the hook 26G of the electric chain block 26 is locked to the locking portion 38B of the assembling pedestal, and as shown in FIGS.
0, that is, just before the upper edge 38A (the same as the upper edge of the binding body 40) of the assembly base 38 hits the lower edge 22A (see FIG. 3) of the beam member 22. The reason for this is that, as can be seen from FIGS. 1 and 2, the height of the assembly stand 38 is substantially equal to the height of the casing 12 excluding the hopper 42, and the assembly stand 38 is not lifted to the upper end position of the opening 20. And the casing 1 with the binding body 40 in a vertical state.
This is because they cannot be carried inside. Therefore, the assembly base 38
4A, not the upper end of the assembling pedestal 38, the length of the wire 26E wound around the main body 26A of the electric chain block 26 as shown in the schematic view of FIG. In consideration of the above, the lifting margin (L), which is the distance required to lift the binding body 40 from the upper edge 38A of the assembly base 38 to the locking portion 38B to the upper end position of the opening 20.
It is necessary to provide. When the lifting allowance (L) increases, there is a problem that the lifting of the binding body 40 becomes unstable.

However, in the present invention, as shown in FIG. 4 (b), a notch 30 is formed in the beam member 22 so that the main body 26A of the electric chain block 26 fits in the notch 30. Therefore, the hanging allowance (L) can be reduced by the size of the main body 26A as compared with FIG. 4A. Therefore, the locking portion 38B of the assembly base 38 is connected to the assembly base 3
8 can be formed near the upper edge 38A, so that the binding body 40 can be lifted in a stable state.

Next, when the binding unit 40 is lifted up to the upper end of the opening 20 of the binding unit 40, as shown in FIG. 2, the electrode plate 36 faces the casing 12 toward the casing 12 with the longitudinal direction of the binding unit 40 as the center of rotation. 90 ° as described above. If this rotation is performed during the lifting of the binding body 40 in a state where the wire 24E is elongated, the binding body 40 is easily shaken.
It is good to carry out after the lifting of the binding body 40 is completed.

Next, the binding unit 40 is laterally fed into the casing 12 along the track of the rail 24 by the electric chain block 26, and the binding unit 40 is moved to the installation position. After moving to the installation position, the U-bolt is inserted into a hole formed in the suspension plate 35, and the electrode plate 36 is suspended and installed. After the electrode plate 36 is installed, the binding between the assembly base 38 and the electrode plate 36 is released, and the electric chain block 26
The assembling pedestal 38 is returned to the ground by moving and suspending, and the next electrode plates 36 are sequentially installed in the same manner as described above.

As described above, according to the method for suspending and mounting the electrode plate for an electrostatic precipitator of the present invention, the opening provided on the side surface of the casing 12 which does not require the work of engaging with the inlet flue 14 and the outlet flue 16. The electrode plate was suspended from the part 20 into the casing 12. Thereby, the work of attaching the casing 12 to the inlet flue 14 and the outlet flue 16 and the work of attaching the hopper 42 can be performed in parallel with the hanging installation work of the electrode plate 36.

When the binding unit 40 is hung from the side of the casing 12, the opening 20 on the side surface of the casing 12 and the binding unit 40
Have to be suspended in the casing 12 in a vertical state. Therefore, the binding body 40 must be lifted up to the upper end position of the opening 20, and the hanging margin (L) of the assembly base 38 on which the hook 26 </ b> G of the electric chain block 26 is hung becomes large, and the lifting becomes unstable. is there. Therefore, the present invention solves this problem by forming a notch 30 in the beam member 22 forming the upper end of the opening 20 so that the main body 26A of the electric chain block 26 fits in the notch 30. Settled. Thus, the hanging allowance (L) can be reduced, so that the binding body 40 can be hoisted in a stable state.

Also, the assembling of the electrode plate 36 such as a dust collecting electrode plate and the hanging and installation in the casing 12 can be efficiently performed under a consistent flow operation, and the suspension and installation can be performed. Can be moved only by the electric chain block 26. This eliminates the need for transfer from the crane to the electric hoist for traversing unlike the conventional method, which reduces the man-hour for the hanging installation work, shortens the work time, and eliminates the transfer work. Also improve.

In the method of suspending and mounting the electrode plate for the electric precipitator according to the present invention, not only the precipitating electrode plate but also the discharge electrode frame assembled at another place are simultaneously placed on the assembling base 38. It is also possible to suspend and install a binding body that binds the assembly frame 38, the dust collection electrode plate, and the discharge electrode frame. The method of hanging and installing the electrode plate for an electric precipitator of the present invention is not limited to the case where an electric precipitator is newly installed. It can also be carried out when the electrode plate is updated after the dust collector is constructed. In addition, a chain block is used as the hanging / lateral feeding means, but a hoist may be used.

[0026]

As described above, according to the method for suspending and mounting an electrode plate for an electrostatic precipitator according to the present invention, a binding body in which the electrode plate and the assembling stand are bound from the side surface of the casing is suspended. Therefore, in parallel with the hanging and installing work of the electrode plate, the work of connecting with the inlet flue and the outlet flue and the work of attaching the hopper can be performed.

Also, the assembly of the electrode plates such as the dust collecting electrode plate and the discharge electrode frame, and the hanging and installation in the casing can be efficiently performed under a consistent flow operation. Furthermore, the lifting and installation can be performed only by the lifting and traversing means, and it is not necessary to carry over from the crane to the hoist unlike the conventional method. And safety can be improved.

[Brief description of the drawings]

FIG. 1 is a front view illustrating a method of hanging and installing an electrode plate for an electrostatic precipitator according to the present invention.

FIG. 2 is a side view for explaining a hanging installation method of an electrode plate for an electrostatic precipitator according to the present invention.

FIG. 3 is an explanatory view illustrating the relationship between a beam member, an electric chain block, and a rail.

FIG. 4 is an explanatory view illustrating an effect of forming a notch in a beam member.

FIG. 5 is a schematic diagram illustrating a basic configuration of an electric precipitator for explaining a conventional technique.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

[Description of Signs] 10 ... Electric dust collector 12 ... Casing 18 ... Dust-containing gas flow 20 ... Opening part 22 ... Beam member 24 ... Rail 26 ... Electric chain block (hanging / lateral feeding means) 30 ... Beam member Notch 32 ... Ground 34 ... Ground rail 36 ... Electrode plate 38 ... Assembly base 40 ... Bundling body 42 ... Hopper

Continuation of the front page (72) Katsuyuki Kamakura, Inventor Hitachi Plant Construction Co., Ltd. 1-11-1 Uchikanda, Chiyoda-ku, Tokyo (56) References JP-A-49-50569 (JP, A) JP-A-52- 133177 (JP, A) JP-A-56-147842 (JP, A) JP-A-4-102655 (JP, U) JP-B-2-39942 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B03C 3/00-3/88

Claims (4)

(57) [Claims] A dust in a dust-containing gas supplied into the casing from one end side of the casing is collected by an electrode plate and exhausted from the other end side of the casing, and the collected dust is discharged to a lower portion of the casing. An electric precipitator to be stored in a hopper provided, wherein a plurality of electrode plates are suspended in the casing and installed at a predetermined installation position. A suspending / lateral feeding means for opening at least one of the casing side surfaces parallel to the flow of the dust-containing gas among the casing side surfaces, and suspending the electrode plate on a ceiling portion of the casing and laterally moving the electrode plate to an installation position. A rail for one end of which extends from the opening to the outside of the casing, and then assembles the electrode plate on an assembling pedestal on the ground. The bound body is moved to a position below the overhang of the rail, and then the bound body is suspended to the upper end position of the opening by a suspending / lateral feeding means movably supported by the rail. Next, after traversing to the installation position, then, after installing the electrode plate of the binding body at the installation position, the binding between the assembly base and the electrode plate is released to move the suspending and traversing means, and A method of suspending and mounting an electrode plate for an electrostatic precipitator, wherein the assembling base is returned to the ground by hanging down. 2. A notch is formed in a beam member forming an upper end of an open portion of the casing, and the rail is disposed so that a main body of the lifting / transporting means is accommodated in the notch. 2. The method of hanging an electrode plate for an electrostatic precipitator according to claim 1, wherein a hanging margin of the binding body suspended by the lifting / lateral feeding means is reduced. 3. A method according to claim 1, wherein said rail is a steel frame member (H-shaped steel) which also serves as a ceiling frame of said casing. 4. The electrode plate for an electrostatic precipitator according to claim 1, wherein said opening portion can be opened and closed so that said electrode plate is opened when carrying in and out of said casing. Hanging installation method.