JP5787652B2 - Electrode dust collector electrode replacement method and lifting electrode loading / unloading stand - Google Patents

Description

  The present invention relates to a method for exchanging electrodes such as a dust collecting electrode and a discharge electrode of an electrostatic precipitator, and a gantry used in this method, and in particular, taking out and carrying in an electrode when an electric precipitator is updated. The present invention relates to a method of replacing an electrode of an electrostatic precipitator that can be safely and efficiently performed when performing, and a mount.

  Inside the casing of the electrostatic precipitator, the dust collecting electrode and the discharge electrode are suspended facing each other at a predetermined interval. In the case of a large electrostatic precipitator, the electrode has a horizontal length of several meters. The vertical length is as much as a dozen or more meters. When the electrode is deteriorated due to, for example, corrosion during the long time operation of the electrostatic precipitator, it is necessary to update to a new electrode.

  As a conventional method for installing an electrode for an electrostatic precipitator, for example, as described in Patent Document 1, an opening is provided in the ceiling of the casing of the electrostatic precipitator, and a dust collecting electrode or the like is provided from this opening. The electrode plate was taken in and out. In Patent Document 1, when an electrode plate is taken in and out, a box body that houses the electrode plate is used, and this box body is suspended by a crane to carry in and carry out the work.

  In addition, as a renewal method, for example, as shown in Patent Document 2, there is known a method in which an opening is provided in an upper part of a side surface of a casing, and an electrode plate is taken in and out from this opening.

JP 2001-145841 A JP-A-7-96214

  In the method for installing / updating the electrode plate of the electrostatic precipitator according to the above-described conventional technology, the electrode plate is lifted up to the ceiling or the upper side of the casing of the electrostatic precipitator and carried into the casing. Since a large-scale electrostatic precipitator has a ceiling height of 20 m or more, when the electrode plate is carried into such an electrostatic precipitator, it is necessary to considerably increase the lifting height of the crane. In this case, there is a problem that the influence of wind during work is large and the safety is poor.

  In addition, when an opening is provided on the side surface of the casing of the electrostatic precipitator, it is necessary to assemble a working scaffold or a base for guiding the electrode plate. However, in order to assemble a scaffold or a base, it is necessary to temporarily remove piping and the like arranged around the casing, which is a large-scale work and makes it difficult to shorten the construction period.

  The present invention has been made to solve the above problems, and when replacing the electrode plate of the electrostatic precipitator, the work can be safely performed without being affected by wind during the work, and the work can be efficiently performed. It is an object of the present invention to provide a method for replacing an electrode of an electrostatic precipitator capable of shortening the work period and to provide a lifting electrode loading / unloading base for carrying out this method.

  In order to achieve the above object, the method of replacing an electrode of an electrostatic precipitator according to the present invention includes a step of providing an opening in a lower portion of a side surface of a casing of the electrostatic precipitator, and a step of horizontally arranging an electrode plate to be carried on a carry-in / out stand And a step of lifting and connecting the loading / unloading base on which the electrode plate is disposed to the opening, a step of sliding the electrode plate from the loading / unloading base connected to the opening into the casing, and the casing And lifting the electrode plate carried into the suspension position.

Also, in the electrode replacement method of the electrostatic precipitator having the above-described characteristics, in the step of lifting the electrode plate, the lifted electrode plate is shifted to the wall surface side opposite to the opening forming wall surface in the casing. Then, after the temporary installation of all the electrode plates and the completion of the temporary installation, the electrode plates may be suspended to the normal suspension position.
By adopting such a method, a lifting space for the electrode plate, which is a long object, can be secured in the casing at the time of carrying in the electrode plate.

  Moreover, the electrode replacement method of the electrostatic precipitator according to the present invention for achieving the above object includes a step of providing an opening in a lower portion of the casing side surface of the electrostatic precipitator, and a step of lowering the electrode plate to be carried out to the lower portion of the casing And lifting the loading / unloading platform to connect to the opening, and sliding the electrode plate lowered to the lower part of the casing to the loading / unloading platform connected to the opening, and horizontally arranging the loading / unloading platform And a step of lifting the loading / unloading platform in which the electrode plates are horizontally arranged and lifting the loading / unloading platform to the ground.

Moreover, in the electrode replacement method for an electrostatic precipitator having the above-described characteristics, the electrode plate suspended at a regular suspension position is placed in the opening before the step of lowering the electrode plate to the lower part of the casing. It is preferable to carry out a temporary placement step by moving to the wall surface side opposite to the wall surface provided with the.
By adopting such a method, it is possible to secure a space in the casing for performing an operation for lowering the electrode plate, which is a long object, to the lower part of the casing when the electrode plate is carried out.

  Further, in the electrode replacement method for an electrostatic precipitator having the above-described characteristics, in the step of connecting the carry-in / out rack to the opening, a connection portion of the carry-in / out rack is provided inside the casing, A part of the cradle may be arranged in the casing.

  By adopting such a method, it becomes possible to perform the connection work of the loading / unloading base in the casing. Therefore, there is no need to provide a scaffold or the like for connection work outside the casing.

The lifting electrode loading / unloading stand according to the present invention for achieving the above object is a loading / unloading stand that can be lifted by horizontally placing an electrode plate used in an electric dust collector. The lower part is provided with a sliding surface, and the connection part connected to the opening part provided in the casing of the said electric dust collector is provided in the site | part facing the said dust collector .
According to the electrode loading / unloading stand having such a configuration, the electrode plate can be lifted in a horizontally arranged state.

  Furthermore, in the lifting type electrode loading / unloading platform having the above characteristics, it is preferable that the sliding surface is constituted by a roller conveyor. According to having such a feature, the operation | work which mounts or drops an electrode plate becomes easy.

  According to the electrode replacement method of the electrostatic precipitator having the above-described characteristics, when replacing the electrode plate of the electrostatic precipitator, the operation can be safely performed without being affected by wind during the operation. In addition, the work can be performed efficiently, and the construction period can be shortened.

It is a perspective view of the electric dust collector of the state which is performing the electrode carrying in / out operation | work which concerns on embodiment. It is a fragmentary sectional view which shows the side surface structure of the electrostatic precipitator of the state which is performing the electrode carrying in / out operation | work which concerns on embodiment. It is a fragmentary sectional view which shows the front structure of the electrostatic precipitator of the state which is performing the electrode carrying in / out operation | work which concerns on embodiment. It is a figure which shows the structure of the lifting type electrode carrying-in / out stand based on embodiment, (A) shows a plane structure, (B) shows a side structure, (C) is a case where (A) is seen from the right side. It is a figure which shows a front structure. It is a figure for demonstrating the process which provides an opening part in a casing. It is a figure for demonstrating the process of mounting an electrode plate in a lifting type electrode carrying in / out stand. It is a figure for demonstrating the process of lifting a lifting type electrode carrying in / out stand, and connecting to a casing. It is a figure for demonstrating the process of sliding an electrode plate in a casing from a lifting type electrode carrying in / out stand. It is a figure for demonstrating the process of lifting the electrode plate carried in in the casing. It is a figure for demonstrating connecting a two-stage type electrode plate. It is a figure for demonstrating the process of temporarily installing the electrode plate suspended. It is a figure for demonstrating that all the electrode plates to carry in are put together and temporarily installed. It is a figure for demonstrating to justify using a J volt | bolt. It is a figure for demonstrating hanging in a regular position with a U volt | bolt. It is a figure for demonstrating the process of suspending the temporarily installed electrode plate in the normal position using a U volt | bolt.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments relating to an electrode replacement method for an electrostatic precipitator and a lifting electrode loading / unloading platform according to the present invention will be described in detail below with reference to the drawings.
As shown in FIGS. 1 to 3, an electrostatic precipitator to which the electrode replacement method for an electrostatic precipitator according to the present embodiment is applied is a casing 10 a and a dust collecting electrode 52 suspended in the casing 10 a (FIG. 5). , See FIG. 6), and discharge electrode 54 (see FIGS. 5 and 6). The casing 10a is provided with an exhaust gas inlet 12 on one side and a processing gas outlet 28 on the opposite side. In addition, a hopper 14 is provided in the lower part so that dust removed from the exhaust gas can be accumulated. In the casing 10a, an erection beam 18, a hoist 20, an electrode suspension beam 22, a roller conveyor 24, and the like are provided.

  In addition, the electrostatic precipitator 10 shown in FIGS. 1-3 is an example of a form provided with a two-stage type dust collection electrode and a discharge electrode. 1 is an external perspective view of the electrostatic precipitator when the electrode replacement method according to the embodiment is performed, FIG. 2 is a partial cross-sectional side view, and FIG. 3 is a partial cross-sectional front view. is there.

  The erection beam 18 is a beam for traversing the hoist 20 and is stretched in a direction orthogonal to the flow direction of the exhaust gas. The hoist 20 is an electrode plate 56 such as a dust collection electrode 52 and a discharge electrode 54 carried into the casing 10a (hereinafter, either the dust collection electrode or the discharge electrode, or both, It is an overhead crane for lifting the electrode plate 56 and lifting the electrode plate 56 suspended from the electrode suspension beam 22.

  The electrode suspension beam 22 is a beam for suspending the electrode plate 56 described above. The electrode suspension beam 22 is stretched on the lower side of the erection beam 18 in a direction parallel to the erection beam 18, that is, in a direction orthogonal to the flow direction of the exhaust gas. By setting it as such a structure, the plate | board surface of the electrode plate 56 suspended by the electrode suspension beam 22 becomes parallel to the distribution direction of waste gas, and the waste gas processing efficiency is improved.

  The roller conveyor 24 is provided on the lower side of the electrode plate suspension region in the casing 10a and on the upper portion (hopper base portion) of the hopper 14. The roller conveyor 24 constitutes a sliding surface for horizontally moving the electrode plate 56 carried in or out through the opening 16 to be described in detail later.

  In the electric dust collector 10 having such a basic configuration, a high voltage is applied to the discharge electrode 54, and an electric field is formed between the discharge electrode 54 and the dust collector electrode 52. Then, the exhaust gas around the discharge electrode 54 is ionized to supply ions. Thus, when exhaust gas containing dust particles is introduced from the exhaust gas inlet, the dust particles can be charged with ions and collected on the dust collecting electrode 52 by Coulomb force. Then, the exhaust gas from which the dust particles have been removed is discharged from the processing gas discharge port 28 as a processing gas. The dust collecting electrode 52 is periodically hammered on the frame (follow-up portion) constituting the dust collecting electrode 52 so that the collected dust is removed and accumulated in the hopper 14, thereby collecting the dust collector. The ability can be restored.

  When the electrode replacement method according to the present embodiment is applied to the electrostatic precipitator 10 having such a basic configuration, a side wall of the casing 10a that is orthogonal to the flow direction of the exhaust gas, that is, the exhaust gas flow An opening 16 is formed in the wall surface 15 where no inlet or processing gas discharge port is provided. The opening 16 is provided at the lower end (lower side) of the side wall of the casing 10a. Thereby, the lower end part of the opening part 16 and the lower end part of the casing 10a correspond, and the roller conveyor 24 installation surface will face the opening part 16. Therefore, handling of the electrode plate 56 carried in / out becomes easy.

  Here, the shape of the opening 16 is not particularly limited, but a rectangle such as a rectangle is preferable in view of ease of shape formation and good workability. Further, the size of the opening 16 is not particularly limited, but at least the width and the height need to have a width and a height that allow the horizontally disposed electrode plate 56 to be inserted. is there. This is because the electrode plate 56 is carried in and out through the opening 16.

  In addition, a hinge portion (not shown) for connecting a lifting electrode loading / unloading platform 30 described in detail later is provided in the vicinity of the opening 16 and inside the casing 10a.

  In the present embodiment, the electrode plate 56 is carried into and out of the casing 10a using a lifting electrode carry-in / out stand (hereinafter simply referred to as the carry-in / out stand 30). As shown in FIG. 4, the carry-in / out stand 30 according to the embodiment includes a frame 32, a fall prevention guide 34, a roller conveyor 38, and a connection portion 40.

  The frame 32 has a substantially rectangular planar shape and includes a lattice-shaped middle beam 32a. With such a configuration, resistance to distortion such as twisting can be increased. The fall prevention guide 34 is a fence arranged so as to form a U shape on one side of the long side and the short side of the frame 32, and prevents the horizontally arranged electrode plate 56 from sliding down from the frame 32. To play a role. In addition, you may make it provide the handrail 34a with the fall prevention guide 34 in the arrangement position of the fall prevention guide 34, as shown in FIGS.

  The roller conveyor 38 is arranged on the electrode plate arrangement surface of the frame 32 along the long side direction. With such a configuration, the electrode plate 56 disposed horizontally on the frame 32 can be slid along the long side direction. Here, a slip prevention member such as a pile (not shown) is provided on the short side where the fall prevention guide 34 is not provided. This is to prevent the electrode plate 56 disposed horizontally on the roller conveyor 38 from falling. The drop prevention guide 34 provided along the long side is provided with a plurality of suspension holes 36. This is because a wire 74 is connected to the suspension hole 36, and the loading / unloading platform 30 can be lifted by a lifting means such as a crane 70 or the like.

  The connecting portion 40 is a hinge portion that can be pin-joined, and is configured to be pin-joinable with a hinge portion (not shown) provided in the opening portion 16 of the casing 10a (the lower portion of the casing 10a near the opening portion 16). . For this reason, the connection portion 40 is provided with a pin hole 42.

  The electrode replacement method for an electrostatic precipitator according to the present invention is performed on the electrostatic precipitator 10 having the above-described configuration using the carry-in / out rack 30 as described above. First, the electrode plate carrying-in method will be described below with reference to FIGS.

First, as shown in FIG. 5, the opening 16 for carrying in and out the electrode plate 56 is formed in the lower part of the side surface of the casing 10a.
Next, as shown in FIG. 6, the electrode plate 56 to be carried in is horizontally arranged on the mounting surface of the loading / unloading base 30 horizontally arranged on the ground. At this time, a floor plate 64 (see FIGS. 1 and 2) is preferably disposed between the roller conveyor 38 and the electrode plate 56 so as to ensure slipperiness and posture stability of the electrode plate 56. After the electrode plate 56 is arranged, an anti-slip member (not shown) is arranged to prevent the electrode plate 56 from sliding in the direction in which the roller conveyor 38 is arranged. Here, the electrode plate 56 refers to a state in which the discharge electrode 54 and the dust collecting electrode 52 that form a pair are overlapped and bundled with a wire 58 (see FIGS. 11 and 12) and the like.

  Next, as shown in FIG. 7, a wire 74 is connected to the suspension hole 36 of the loading / unloading platform 30 to lift the loading / unloading platform 30. At this time, the crane 70 is used for lifting the loading / unloading platform 30, but it is desirable to place a balance 72 between the hook of the crane 70 and the wire 74 connected to the loading / unloading platform 30. This is because it is possible to reduce the burden on the wire 74 that occurs when the hooking is performed, and to easily lift the loading / unloading platform 30 in a horizontal state.

  The lifting height of the carry-in / out stand 30 may be about the height of the bottom of the opening 16 in the electrostatic precipitator 10, that is, the height of the base of the hopper 14. With such a height, the influence of the wind during the work is small and the time required for the lifting operation is short, so that the work can be performed quickly.

  The loading / unloading platform 30 lifted by the crane 70 is brought close to the opening 16 in the casing 10a, and the connecting portion 40 is connected. The connection of the connection part 40 may be a pin joint. That is, the pin hole (not shown) of the hinge part provided in the vicinity of the opening 16 at the lower part of the casing 10a and the pin hole 42 of the connection part 40 provided on the loading / unloading base 30 are overlapped, and the joining pin (not shown) is overlapped there. (Shown) may be inserted.

  Thereafter, as shown in FIG. 8, the anti-slip member provided on the carry-in / out stand 30 is removed, and the electrode plate 56 placed on the carry-in / out stand 30 is carried into the casing 10 a through the opening 16. The electrode plate 56 carried into the casing 10 a is slid and moved on the roller conveyor 24, and is conveyed to the back side of the casing 10 a, that is, the side wall side opposite to the opening 16.

  The electrode plate 56 conveyed to the back side of the casing 10a is pulled up by the hoist 20 (see FIG. 9). The electrode plate 56 may be lifted by inserting a wire 74 or the like into a bolt hole (both the beam and bolt hole are not shown) provided in the beam of the electrode plate 56 and hooking it on the hook of the hoist 20.

  Here, when the electrode plate 56 carried in is an upper electrode plate (an electrode plate disposed on the upper part of the two-stage electrode plate), it is connected to an electrode plate 56 (lower electrode plate) carried in later. A shackle 62 or the like may be used for connection between the upper electrode plate 56 and the lower electrode plate 56. Specifically, a connection hole (not shown) provided in the frame of the upper electrode plate 56 and a connection hole (not shown) provided in the frame of the lower electrode plate 56 may be connected by the shackle 62. . The electrode plates 56 may be connected to each other before being lifted by the hoist 20.

  Next, as shown in FIG. 11, the suspended electrode plate 56 is moved to the electrode suspension beam 22 and suspended. Here, the electrode plate 56 is suspended from the electrode suspension beam 22 by temporarily moving the electrode plate 56 toward the back side of the casing 10a. This is because a working space for lifting the electrode plate 56, which is a long object, is secured inside the casing 10a (see FIG. 12).

  As described above, when the electrode plate 56 is arranged so as to be different from the normal hanging position, it is preferable to use a hook-shaped J bolt 50 as shown in FIG. When the electrode plate 56 is normally suspended, a U bolt 60 as shown in FIG. 14 is used. However, by arranging the tip of the hook of the J bolt 50 so as to face each other, Two J bolts 50 can be arranged in the mounting space. By temporarily setting the electrode plate 56 to each of the J bolts 50 arranged in this way, the electrode plate 56 can be arranged in a side-by-side manner.

  After all the electrode plates 56 have been carried in and the temporary installation for the J bolts 50 has been completed, as shown in FIG. 15, the J bolts 50 arranged on the electrode suspension beam 22 are replaced with U bolts 60, and the electrode plates 56 are moved to the normal positions. The work to hang to is performed. Specifically, the electrode plate 56 temporarily installed on the J bolt 50 is suspended by the hoist 20, and the electrode suspension beam 22 of the electrode suspension beam 22 is passed through a U bolt 60 to a bolt hole (a bolt hole provided in the beam: not shown) of the electrode plate 56. Repeat the work of fixing to the normal position. Thereafter, the dust collecting electrode 52 and the discharge electrode 54 are separated, and the discharge electrode 54 is suspended from the normal position.

  By carrying in the work of loading the electrode plate by such a method, work such as large-scale scaffolding and installation of a gantry at the site becomes unnecessary. In addition, since there is no need to install a large scaffold or pedestal, the frequency of temporarily removing piping 26 (see FIG. 2) and the like arranged around the casing 10a is reduced, and the construction period is greatly shortened. be able to. In addition, since the cost of renting materials that make up the scaffolding and the gantry can be reduced, the cost can be reduced. Furthermore, since the electrode plate 56 can be transported in a horizontally arranged state, the time required for carrying in (lifting time) is shortened compared to the conventional method in which vertical suspension or angle is performed. can do. For this reason, construction efficiency can be improved. Moreover, since the lifting height of the electrode plate 56 by the crane 70 may be the height of the base portion of the hopper 14 projecting from the bottom of the casing 10a, the influence of wind during work is small and safety is high.

  Next, the carrying-out operation of the electrode plate 56 will be described. The carrying-out operation of the electrode plate 56 may be basically performed in the reverse flow of the carrying-in operation of the electrode plate 56. That is, the electrode plate 56 suspended at the regular position is temporarily placed at the one-sided position and then lowered onto the roller conveyor 24 and transferred to the loading / unloading platform 30 via the opening 16. Thereafter, the connection of the loading / unloading platform 30 is released, the crane 70 is lifted and lowered to the ground, and the electrode plate 56 placed on the loading / unloading platform 30 is lowered from the loading / unloading platform 30. In addition, regarding the detailed operation | work of each process, the description about the carrying-in operation | work of the electrode plate 56 mentioned above shall be used. Naturally, even when the electrode plate 56 is carried out, the opening 16 is formed in the lower part of the side surface of the casing 10a before the work.

  In the said embodiment, the roller conveyor 38 was arrange | positioned in the surface which mounts the electrode plate 56 in the carrying in / out stand 30, and this was made into the sliding surface. However, the elements constituting the sliding surface may be any element that has a lower coefficient of friction than the members constituting the frame 32 and can easily slide the horizontally disposed electrode plate 56. That is, it may be a resin rail or a simple roller.

DESCRIPTION OF SYMBOLS 10 ......... Electric dust collector, 10a ......... Case, 12 ......... Exhaust gas inlet, 14 ......... Hopper, 15 ......... Wall surface, 16 ......... Opening part, 18 ......... Erection beam, 20 ......... Hoist, 22 ......... Electrode suspension beam, 24 ......... Roller conveyor, 26 ......... Piping, 30 ...... Raised electrode loading / unloading platform (loading / unloading platform), 32 ......... Frame, 32a ......... Center beam, 34 ......... Fall prevention guide, 34a ......... Handrail, 36 ......... Hanging hole, 38 ......... Roller conveyor, 40 ......... Connecting part, 52 ......... Dust collecting electrode, 54 ……… Discharge electrode, 56 ……… Electrode plate.

Claims (7)

Providing an opening in the lower part of the casing side surface of the electric dust collector;
A step of horizontally placing an electrode plate to be carried on a carry-in / out stand; and
The process of lifting the loading / unloading base on which the electrode plate is arranged and connecting to the opening,
Sliding the electrode plate into the casing from the loading / unloading base connected to the opening;
And a step of lifting the electrode plate carried into the casing to a hanging position. The method for replacing an electrode of an electrostatic precipitator. In the step of lifting the electrode plate,
The electrode plate that has been lifted is temporarily moved to the wall surface side opposite to the opening forming wall surface in the casing and temporarily installed,
2. The method of replacing an electrode of an electrostatic precipitator according to claim 1, wherein the electrode plate is suspended to a regular suspending position after all electrode plates have been carried in and temporarily installed. Providing an opening in the lower part of the casing side surface of the electric dust collector;
Lowering the electrode plate to be unloaded to the lower part of the casing;
Lifting the loading / unloading platform and connecting to the opening;
Sliding the electrode plate lowered to the lower part of the casing onto the loading / unloading platform connected to the opening, and horizontally arranging the loading / unloading platform;
An electrode replacement method for an electrostatic precipitator, comprising: lifting the loading / unloading platform in which the electrode plates are horizontally arranged and lowering the loading / unloading platform to the ground. Before the step of lowering the electrode plate to the lower part of the casing,
The electricity according to claim 3, wherein the step of temporarily placing the electrode plate suspended at a regular suspension position by moving it toward the wall surface opposite to the wall surface provided with the opening is performed. How to replace the dust collector electrode.   In the step of connecting the carry-in / out rack to the opening, a connection portion of the carry-in / out rack is provided inside the casing, and a part of the carry-in / out rack is disposed in the casing. Item 5. A method for switching electrodes of an electrostatic precipitator according to any one of Items 1 to 4. It is a loading / unloading stand that can be lifted by horizontally arranging electrode plates used in an electric dust collector,
In the lower part of the electrode plate arrangement position, provided with a sliding surface ,
A lifting electrode loading / unloading base comprising a connection portion connected to an opening provided in a casing of the electric dust collector at a portion facing the dust collector .   The lifting electrode loading / unloading platform according to claim 6, wherein the sliding surface is constituted by a roller conveyor.

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