JP6382063B2 - Moving electrode replacement method - Google Patents

Description

  The present invention relates to a replacement method of components of a dry electrostatic precipitator used for electric power and industrial smoke exhaust facilities, and more particularly to a replacement method of a moving electrode using a moving electrode as a dust collecting electrode plate.

  There are electrostatic precipitators that remove smoke from boiler exhaust gas from thermal power plants and exhaust gas from various steelmaking furnaces.

FIG. 11 is a diagram showing a schematic configuration of the electric dust collector.
In the electrostatic precipitator 1, a plurality of fixed electrodes 3 and moving electrodes 4 are installed as dust collecting electrodes in a casing 2 in which a gas flow path is formed between a gas inlet 2a and a gas outlet 2b. Yes. A plurality of hoppers 6 for dropping and collecting the dust collected by the electrodes are provided below each electrode.

FIG. 12 is a diagram showing a schematic configuration of the moving electrode of the electrostatic precipitator.
The moving electrode connects the dust collecting electrode plate 9 divided into strips in a suspended state to a pair of roller chains 10 forming a loop, and the release electrode suspended in the gas flow path together with the roller chain 10 by the driving means 11. While moving around an electrode (not shown), dust contained in the gas is collected in the dust collection area 12 serving as a gas flow path. The roller chain 10 is wound around an upper drive roller 16 and a lower lower roller 17. The dust collected on the dust collecting electrode plate 9 is scraped off into the hopper 6 by the rotating brush 15 attached to the non-dust collecting region 13 whose gas flow path is partitioned by the partition plate 14. A plurality of such moving electrodes are arranged along the cross section of the gas flow path.

  In the electrostatic precipitator having the above-described configuration, if the movable part of the movable electrode constituent member is worn when operated for a predetermined period, the member needs to be replaced. Specifically, when the collecting electrode plate, the roller chain, the driving roller, and the lower roller, which are constituent members of the moving electrode, reach the replacement standard for use, maintenance work for replacement is performed.

  In Patent Document 1, there is a modification method in which an existing fixed electrode type dust collector is replaced with a moving dust collecting electrode plate and a discharge electrode corresponding to the moving dust collecting electrode plate. After forming and removing the fixed electrode type electrostatic precipitator using the upper hoist facing the opening, the movable dust collecting electrode plate and the discharge electrode are lifted from the opening by the hoist and carried.

  In Patent Document 2, a part of an existing endless chain is cut off, the new chain is connected and moved around, the dust collecting electrode plate is replaced, and the connection with the new chain is released when the new chain makes a round. A replacement method for connecting the ends of the new chain is disclosed.

  Patent Document 3 discloses a loading method in which a loading stage in which components of a moving electrode are temporarily arranged and a loading manhole that is passed through the casing from the loading stage into the casing are disclosed.

JP 2012-179526 A JP 2000-342995 A JP 2010-64023 A

  However, the remodeling method disclosed in Patent Document 1 requires that the hopper at the lower part of the casing is removed in advance before the work, and the hopper is attached again after the work, which may prolong the work period. Further, since all the hoppers at the lower part of the casing are removed, there is a problem that other work cannot be performed during the replacement work.

  Moreover, the exchange method disclosed in Patent Document 2 is intended for link chains, and if such a chain is used, it can be stored in a storage box that is compacted and installed in a casing when attached and detached. However, the roller chain is composed of an outer plate and an inner plate, which are alternately connected using bushes, rollers, and pins. Since such a roller chain has a restricted range of motion compared to the ring chain, it cannot be folded to save space. Patent Document 2 does not describe any opening for carrying in or out the replacement part into the casing.

  In the replacement method disclosed in Patent Document 3, the mounting position of the loading manhole is at a position where it intersects with the plate surface of the dust collecting electrode plate, in other words, along a side surface of the roller chain (a surface perpendicular to the pin axis). The roller chain is inserted into the casing from the direction orthogonal to the circumferential direction of the roller chain. In this case, the roller chain has a problem in that it is difficult to mount because the movable range on the side surface side is limited compared to the movable range around the pin axis.

  Accordingly, an object of the present invention is to provide a moving electrode replacement method capable of efficiently replacing a roller chain of a moving electrode in a short period of time in view of the above-described problems of the prior art.

In the present invention, as a first means for solving the above-mentioned problems, a chain block is connected to an old roller chain that moves around a driving roller and a lower roller of a moving electrode arranged vertically in an electrostatic precipitator. A cutting step for temporarily fixing and cutting the lower end of the old roller chain, and an opening along the electrode surface of the dust collecting electrode plate of the moving electrode provided in a part of the hoppers arranged below the lower roller Carrying in a new roller chain from the opening having a surface to the lower roller, an ascending side end of the old roller chain, a connecting step of connecting the new roller chain, and the chain block An attaching / detaching step of attaching a roller chain from the lower roller to the driving roller, and removing the old roller chain from the lower roller; and the old roller chain The emissions, and discharge step of discharging from the opening in a state in which the New steel roller chain is connected, after the removal of the old roller chain from the lower roller, to release the connection with the New manufactured roller chain, It is an object of the present invention to provide a moving electrode exchanging method comprising: a connecting step of connecting ends of the new roller chain and connecting them in a loop shape.

  According to the present invention, as a second means for solving the above-described problem, in the first means, the chain block is connected to an upstream chain block connected to an upstream roller chain and a downstream roller chain. The lower chain block comprises the downstream chain block, and the attaching and detaching step includes lowering the upstream chain block and simultaneously winding the downstream chain block to move the old roller chain so that the upstream chain block and the downstream chain block are moved. It is an object of the present invention to provide a moving electrode replacement method in which the old roller chain is removed from the lower roller by changing the temporarily fixing position.

  According to the present invention, as a third means for solving the above-mentioned problem, in the first or the second means, the new roller chain includes the dust collecting electrode plate. It aims to provide a replacement method.

  According to the present invention, as a fourth means for solving the above-mentioned problems, in the first or second means, the attaching and detaching step includes removing the dust collecting electrode plate of the old roller chain and the new roller chain. It is an object of the present invention to provide a method for replacing a moving electrode, wherein the old roller chain is removed after being attached to a roller.

  The present invention provides, as a fifth means for solving the above-mentioned problem, in the means according to any one of the first to fourth aspects, in two upper and lower stages over a plurality of hoppers of the electric dust collector. A conveyor is arranged, the new roller chain inserted from the opening at the lower conveyor is carried to the lower roller, and the old roller chain removed from the lower roller at the upper conveyor is carried out from the opening. It is an object of the present invention to provide a moving electrode replacement method.

According to the present invention as described above, the old roller chain is taken out from the openings provided in a part of the plurality of hoppers, and the new roller chain is carried in, so the replacement work can be efficiently performed in a short process and in a short time. It can be performed.
Further, since the old roller chain is removed and the new roller chain is attached at the same time, the moving electrode can be exchanged efficiently in a short time.

Further, by providing the opening on the inclined surface of the casing, the roller chain whose movable range is limited can be easily put in and out without being bent at an acute angle.
According to the present invention as described above, since the upper and lower conveyors are arranged on the hopper, it is only necessary to provide an opening in a part of the hopper, and the replacement operation can be performed efficiently in a short process. . In addition, other work can be performed in parallel during the replacement work.

It is explanatory drawing of the replacement | exchange method of the moving electrode of this invention. It is a perspective view of the replacement | exchange operation | movement of the moving electrode in an electric dust collector. It is a work flowchart of the exchange method of a roller chain with a dust collecting electrode plate. It is explanatory drawing which suspends and fixes a lower roller temporarily. It is explanatory drawing of a chain block. It is explanatory drawing of the connection of the roller chain with an old and new dust collection electrode plate. It is explanatory drawing of the change of a chain block. It is explanatory drawing of a connection of the roller chain with a new dust collection electrode plate. It is a flowchart of the replacement | exchange operation | work of a roller chain. It is explanatory drawing of transfer of a dust collection electrode plate. It is a figure which shows the structure outline of an electrical dust collector. It is a figure which shows the structure outline of the moving electrode of an electrostatic precipitator.

  Embodiments of the moving electrode replacement method of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is an explanatory view of the moving electrode replacement method of the present invention. In FIG. 1, the chain block is omitted. FIG. 2 is a perspective view of the replacement operation of the moving electrode in the electric dust collector.

[How to replace a roller chain with a dust collecting electrode plate]
The replacement work when the dust collecting electrode plate and the roller chain, which are constituent members of the moving electrode, have reached the replacement standard by use will be described below.
FIG. 3 is a work flow diagram of a method for replacing a roller chain with a dust collecting electrode plate.
The roller chain 20 with a new dust collecting electrode plate of the present embodiment has a basic configuration of a pair of roller chains 10 and a plurality of dust collecting electrode plates 9. The plurality of dust collecting electrode plates 9 have a pair of roller chains 10 attached to both sides in the width direction. The plurality of dust collecting electrode plates 9 are attached to a pair of roller chains 10 at a predetermined pitch. The roller chain 20 with a new dust collecting electrode plate is not connected in a loop shape by connecting both ends of the chain.
Openings 30 are formed in a part of the plurality of hoppers (step 1).

[Opening 30]
A plurality of hoppers 6 for collecting dust are formed below the electric dust collector 1. The hopper 6 has a quadrangular pyramid shape with the tip convex portion facing downward, and is formed so that two opposing side surfaces are parallel to the plate surface of the dust collecting electrode plate 9.
The opening of the present invention is provided not in the casing 2 of the electrostatic precipitator 1 but in the hopper 6. If the opening is provided on the side surface of the casing 2 on the extension line (horizontal direction) of the scaffold on which the roller chain is mounted on the hopper 6, the roller chain can be taken out in a state of being straightened. Is installed with existing pipes, and it is difficult to provide an opening space on such a side surface. In addition, an opening space that allows a roller chain with a limited range of motion to be put in and out without bending. It is difficult to establish. On the other hand, the hopper 6 drops dust below the casing 2 along the inclination of the side surface, and since no equipment such as piping is attached, the roller chain is inserted into and removed from the side surface so as not to be bent. It is easy to provide an opening space.

  The opening 30 of the present invention shown in FIG. 1 has both sides (the right end in FIG. 1 or the right side in FIG. 1) of the plurality of hoppers 6a, 6b, 6c, 6d below the moving electrode 4 along the plate surface of the dust collecting electrode plate 9. It is formed on the outer inclined surface along the plate surface of the dust collecting electrode plate 9 in parallel with the dust collecting electrode plate 9 of the hopper 6d (left end in FIG. 1) located in the left hopper 6a, 6d). When an opening is provided in the inner hopper among the plurality of hoppers, it is difficult to insert and remove the roller chain in a straight line due to interference with adjacent hoppers. On the other hand, in the case of one of the hoppers on either side, a space for carrying in or carrying out is vacant outside the opening, so that the roller chain can be taken in and out in a state close to a straight line.

The opening 30 is set to an opening length in which the width direction of the dust collecting electrode plate 9 can be taken in and out when replacing the roller chain 20 with a new dust collecting electrode plate.
Next, a scaffold that spans a plurality of hoppers and an upper and lower two-level conveyor 40 are installed (step 2). The scaffold is laid on the hopper grating so that the operator can work on multiple hoppers. In addition, the grating of the hopper which provides an opening part is provided with an opening space for taking in and out the roller chain.

[Upper and lower two-stage conveyor 40]
The upper and lower two-stage conveyor 40 of the present invention is a two-stage stack of conveyors in which a plurality of freely rotating rollers are formed on a straight line. The upper and lower two-stage conveyor 40 can be attached to the non-dust collection area 13 between the plurality of hoppers 6a, 6b, 6c, 6d of the electric dust collector 1 and the lower roller 17, and the upper conveyor 42 and the lower conveyor 44 are connected to each other. Two layers are stacked vertically. The lower conveyor 44 is formed from the opening 30 of the hopper 6d at one end to the hopper 6a at the other end on the grating of the hopper. The upper conveyor 42 is a conveyor that can be stacked on the lower conveyor 44 and can arbitrarily change the length of the conveyor so that it can expand and contract from the opening 30 side in accordance with the position of the upper moving electrode 4 to be worked. .

  Such an upper and lower two-stage conveyor 40 is configured such that a plurality of divided parts can be connected to form a long conveyor, and can be easily taken in and out from the opening 30. The moving electrode on the hopper provided with the opening can be directly taken in and out from the opening without using the upper and lower two-stage conveyor.

The drive unit of the exchange lane is released (step 3).
A plurality of moving electrodes 4 in the electrostatic precipitator 1 are provided in parallel (lanes) at predetermined intervals. In the present embodiment, the lane to be replaced (hereinafter referred to as “exchange lane”) is performed from the moving electrode located farthest from the opening 30.
The chain cover that covers the drive roller 16 in the replacement lane is removed, and the drive chain provided between the drive means 11 that drives the drive roller 16 and the drive roller is removed to allow the drive roller 16 to freely rotate.

The lower roller 17 is temporarily suspended and fixed (step 4).
FIG. 4 is an explanatory view for temporarily suspending and fixing the lower roller. The shaft 17a of the lower roller 17 can be moved in the vertical direction by a guide 14a (not shown) of the partition plate 14. During operation, the weight of the roller acts on the roller chain 10 to apply tension in the vertical direction. Therefore, the shaft 17a of the lower roller 17 is moved upward along the guide 14a and temporarily suspended and fixed to the internal corridor 50 using a hoist or the like to release the tension acting on the roller chain 10.

The roller chain 22 with the old dust collecting electrode plate is temporarily fixed with two chain blocks (step 5).
FIG. 5 is an explanatory diagram of the chain block. The illustrated roller chain indicates one roller chain, and the other roller chain exists in a direction perpendicular to the paper surface. In the following description, a pair of roller chains receives the same treatment and performs an exchange operation. In the present embodiment, for the roller chain 10 that orbits around the discharge electrode 5 by the driving roller 16, the roller chain that moves upward during the orbiting movement is referred to as the upside roller chain 10a, and the roller chain that moves downward is referred to as the roller chain 10a. This is referred to as a downward roller chain 10b.

  The chain pin of the roller chain 22 with the old dust collecting electrode plate is moved to the lowest end. Two chain blocks composed of the ascending chain block 62 and the descending chain block 64 are attached to the ascending roller chain 10a and the descending roller chain 10b, respectively. The ascending chain block 62 attached to the ascending roller chain 10 a and the descending chain block 64 attached to the descending roller chain 10 b both have the main body fixed to the upper part of the partition plate 14 in the casing 2. Then, the wire is stretched and hooks are hooked on the upside and downside roller chains 10a and 10b and fixed so as not to move around. Next, the chain pin is removed, and the loop-shaped roller chain 22 with the old dust collecting electrode plate is cut.

The roller chain 20 with a new dust collecting electrode plate is carried in from the opening 30 by the lower conveyor 44 (step 6).
The hook 74 of the wire 72 of the upper hoist 70 that has moved onto the exchange lane (the moving electrode at the right end in FIG. 1) is extended to the opening 30 via the lower conveyor 44. Next, after connecting the hook 74 to the chain end of the roller chain 20 with a new dust collecting electrode plate, the wire 72 is wound up and carried from the opening 30 to the lower part of the replacement lane via the lower conveyor 44.

The end of the upstream roller chain 10a of the roller chain 22 with the old dust collecting electrode plate is connected to the end of the roller chain 20 with the new dust collecting electrode plate (step 7).
FIG. 6 is an explanatory view of the connection of the old and new roller chains with dust collecting electrode plates.
The hook 74 of the wire 72 is removed, and the end of the roller chain 20 with a new dust collecting electrode plate is connected to the chain end of the upstream roller chain 10a of the roller chain 22 with the old dust collecting electrode plate.

  The roller chain with the dust collecting electrode plate is moved (step 8). The wire of the ascending chain block 62 is extended by a predetermined stretch allowance (for example, one to several dust collecting electrode plates) (arrow a shown in FIG. 6), and the wire of the descending chain block 64 is stretched by a certain amount. Take up only the bill (arrow b shown in FIG. 6). This operation is performed simultaneously to move the old and new roller chains with the dust collecting electrode plates 22 and 20 around.

The chain block is moved (changed) (step 9).
FIG. 7 is an explanatory diagram of chain block replacement. When the winding allowance of the upstream chain block 62 is full, replacement is performed. It should be noted that the switching work is performed after connecting the anti-inversion hook 66 attached to the partition plate 14 in advance to the roller chain to be removed. First, the hook of the ascending chain block 62 is removed from the ascending roller chain 10a and is re-hanged on the ascending roller chain 10a below in consideration of a predetermined allowance. Next, the hook of the descending chain block 64 is removed from the descending roller chain 10b, and is re-hanged on the upper descending roller chain 10b in consideration of a predetermined extension allowance.

The roller chain 22 with the old dust collecting electrode plate is carried out from the opening 30 by the upper conveyor 42 (step 10).
First, the wire 82 of the carry-out means 80 arranged outside the electrostatic precipitator 1 is extended from the opening 30 to the lower side of the replacement lane through the upper conveyor 42.
The hook 84 of the unloading means is connected to the tip of the roller chain 22 with the old dust collecting electrode plate removed from the lower roller 17. The unwinding of the unloading means 80 unloads the old dust collecting electrode plate roller chain 22 from the upper conveyor 42 toward the opening 30 in synchronization with the movement of the roller chain by the chain block.

It is determined whether or not the roller chain with the dust collecting electrode plate has made one turn (step 11).
If it has not been performed up to the amount corresponding to one rotation of the roller chain 10, the process returns to Step 8 and the steps from Step 8 to Step 10 are repeated for the amount corresponding to one rotation of the roller chain 10.
On the other hand, if it is performed up to the amount corresponding to one rotation of the roller chain 10, the process proceeds to the next step.

The old and new roller chains 22 and 20 with dust collecting electrode plates are disconnected, and the roller chain 20 with new dust collecting electrode plates is connected in a loop (annular). (Step 12).
FIG. 8 is an explanatory view of connection of a roller chain with a new dust collecting electrode plate. The connection between the roller chain 22 with the old dust collecting electrode plate and the roller chain 20 with the new dust collecting electrode plate is released. Next, both ends of the roller chain 20 with a new dust collecting electrode plate are connected and connected in a loop shape.

It is determined whether or not there is a lane for the next moving electrode 4 (step 13).
If the next moving electrode 4 exists, the processes from step 3 to step 12 are repeated again.
At this time, since the next replacement lane approaches the opening 30 side, the upper conveyor 42 may be reduced to the opening 30 side according to the replacement lane. Thereby, replacement | exchange operation | work can be implemented, without preventing carrying in of the roller chain 20 with a new dust collecting electrode plate.
On the other hand, when there is no next moving electrode 4 to be replaced, the operation is finished.
According to the moving electrode replacement method of the present invention, the old roller chain is unloaded from the openings provided in a part of the plurality of hoppers, and the new roller chain is loaded. Can be replaced efficiently.

[How to replace the roller chain]
The replacement operation when only the roller chain 10 which is a constituent member of the moving electrode 4 has reached the replacement standard by use will be described below.
FIG. 9 is a work flow diagram of the roller chain replacement method.

  The roller chain 10 according to the present embodiment includes a pair of roller chains 10 and does not include the dust collection electrode plate 9. The dust collecting electrode plate 9 removed from the old roller chain can be used without reaching the replacement standard, and in this embodiment, it is reused by being attached to a new roller chain.

Openings are formed in a part of the plurality of hoppers (step 101).
In addition to the same form as shown in FIG. 1, the opening may be a round hole as long as the hole diameter allows the roller chain 10 to be inserted.
Next, a scaffold that extends over a plurality of hoppers and upper and lower two-stage conveyors are installed (step 102). The upper and lower two-stage conveyor adopts the same configuration as described above. Note that the step of arranging the upper and lower two-stage conveyors may be omitted.

The drive unit of the exchange lane is released (step 103). This is the same work process as step 3 described above.
The lower roller is temporarily suspended and fixed (step 104). This is the same work process as step 4 described above.
The old roller chain is temporarily fixed with two chain blocks (step 105).

  Move the chain pin of the old roller chain to the lowest end. Two chain blocks composed of the ascending chain block 62 and the descending chain block 64 are attached to the ascending roller chain 10a and the descending roller chain 10b, respectively. The ascending chain block 62 attached to the ascending roller chain 10 a and the descending chain block 64 attached to the descending roller chain 10 b both have the main body fixed to the upper part of the partition plate 14 in the casing 2. Then, the wire is stretched and hooks are hooked on the upside and downside roller chains 10a and 10b and fixed so as not to move around. Next, the chain pin is removed, and the loop-shaped old roller chain is cut.

A new roller chain is carried from the opening by the lower conveyor (step 106).
The hook 74 of the wire 72 of the upper hoist 70 moved onto the exchange lane is extended to the opening 30 via the lower conveyor 44. Next, after connecting the hook 74 to the chain end of the new roller chain, the wire 72 is wound up and carried from the opening 30 to the lower part of the replacement lane.

The upstream side end of the old roller chain and the end of the new roller chain are connected (step 107).
The hook 74 of the wire 72 is removed, and the end of the new roller chain is connected to the chain end of the upstream roller chain 10a of the old roller chain.

The electrode plate is moved (step 108).
FIG. 10 is an explanatory view of the transfer of the dust collecting electrode plate.
The dust collecting electrode plate 9 of the old roller chain 26 is removed, and the removed dust collecting electrode plate 9 is attached to the new roller chain 24.
The roller chain with the dust collecting electrode plate is moved (step 109). The wire of the ascending side chain block 62 is extended by a predetermined stretch allowance (for example, one dust collecting electrode plate), and the wire of the descending side chain block 64 is wound up by a predetermined stretch allowance. This operation is performed simultaneously to move the old and new roller chains around.

The chain block is replaced (step 110). This is the same process as step 9.
The old roller chain is carried out from the opening by the upper conveyor (step 111).
The hook 84 of the unloading means is connected to the tip of the old roller chain removed from the lower roller 17. When the unloading means 80 is wound up, the roller chain is moved and motivated by the chain block, and the old roller chain is unloaded from the upper conveyor 42 toward the opening 30.

It is determined whether or not the roller chain has made one turn (step 112).
If it has not been performed up to the amount corresponding to one rotation of the roller chain, the process returns to Step 108 and the steps from Step 108 to Step 111 are repeated for the amount corresponding to one rotation of the roller chain.
On the other hand, if it is performed up to the amount corresponding to one rotation of the roller chain, the process proceeds to the next step.

Disconnect the old and new roller chains and connect the new roller chains in a loop (annular). (Step 113).
Disconnect the old roller chain from the new roller chain. Next, both ends of the new roller chain are connected and connected in a loop shape.
It is determined whether or not there is a next moving electrode lane (step 114).
If there is a next moving electrode, the steps from Step 103 to Step 113 are repeated again.

On the other hand, if there is no next moving electrode to be replaced, the operation is terminated.
According to the moving electrode replacement method of the present invention, the old roller chain is unloaded from the openings provided in a part of the plurality of hoppers, and the new roller chain is loaded. Can be replaced efficiently.

  The present invention is particularly useful in the field of a dry electrostatic precipitator using a moving electrode as a dust collecting electrode plate.

DESCRIPTION OF SYMBOLS 1 ......... Electric dust collector, 2 ......... casing, 2a ......... gas inlet, 2b ......... gas outlet, 3 ...... fixed electrode, 4 ......... moving electrode, 5 ......... discharge electrode, 6, 6a, 6b, 6c, 6d ......... hopper, 9 ......... dust collecting electrode plate, 10 ......... roller chain, 10a ... ascending roller chain, 10b ......... descending roller chain, 11 ... ... Drive means, 12 ...... Dust collection area, 13 ...... Non-dust collection area, 14 ...... Partition plate, 14a ...... Guide, 15 ...... Rotary brush, 16 ...... Driving roller, 17 ... ...... Lower roller, 17a ......... Shaft, 20 ......... Roller chain with new dust collecting electrode plate, 22 ......... Roller chain with old dust collecting electrode plate, 24 ......... New roller chain, 26 ... ... old roller chain, 30 ......... opening, 40 ... upper and lower two-stage conveyor, 42 ... Step conveyor 44 ......... Lower conveyor 50 ......... Inner corridor 62 ... Up chain chain block 64 ... Down chain block 70 ... Upper hoist 72 ... Wire 74 ... ...... Hook, 80 .... Unloading means, 82 .... Wire, 84 .... Hook.

Claims (5)

A cutting step of connecting and temporarily fixing a chain block to an old roller chain that moves around a driving roller and a lower roller of a moving electrode arranged vertically in an electric dust collector, and cutting the lower end of the old roller chain;
A new roller chain is carried to the lower roller from an opening having an opening along the electrode surface of the dust collecting electrode plate of the moving electrode provided on a part of the hoppers arranged below the lower roller. Carrying-in process;
A connecting step of connecting the upstream end of the old roller chain and the new roller chain;
Attaching and detaching the old roller chain from the lower roller by attaching the new roller chain from the lower roller to the drive roller in the chain block;
A discharging step of discharging the old roller chain from the opening in a state where the new roller chain is connected ;
After removing the old roller chain from the lower roller, release the connection with the new roller chain, connecting the ends of the new roller chain to connect in a loop,
A method for replacing a moving electrode, comprising: The chain block consists of an upstream chain block connected to the upstream roller chain, and a downstream chain block connected to the downstream roller chain,
In the attaching / detaching step, the up-down chain block is wound down and at the same time the down-side chain block is wound up to move the old roller chain, and the positions at which the up-side chain block and the down-side chain block are temporarily fixed are switched. The moving electrode replacement method according to claim 1, wherein the old roller chain is removed from the lower roller.   The moving electrode replacement method according to claim 1, wherein the new roller chain includes the dust collecting electrode plate.   3. The method for replacing a moving electrode according to claim 1, wherein in the attaching / detaching step, the dust collecting electrode plate of the old roller chain is detached and attached to the new roller chain, and then the old roller chain is detached. .   An upper and lower two-stage conveyor is disposed over a plurality of hoppers of the electrostatic precipitator, the new roller chain inserted from the opening by the lower conveyor is carried to the lower roller, and from the lower roller by the upper conveyor. 5. The moving electrode replacement method according to claim 1, wherein the removed old roller chain is carried out from the opening.

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