JP2019078009A - Boiler internal work scaffold, replacement device for boiler water wall, and method for exchanging the same - Google Patents

Abstract

To provide a boiler internal work scaffold capable of easily replacing a boiler water wall even after mounting a working scaffold for inspection in a boiler furnace, and to provide an exchange device for the boiler water wall and a method for exchanging the boiler water wall.SOLUTION: A boiler interior working scaffold 10 of the present invention is provided with upper and lower scaffolds 12,14 suspended along a boiler water wall 228 in a boiler furnace; a connecting part 16 capable of detachably attaching the lower scaffold 14 to the upper scaffold 12; a lifting part 18 extending in a direction crossing the boiler water wall 228 between the upper and lower scaffolds 12,14 and capable of moving in a direction away from the boiler water wall 228 by lifting the lower scaffold 14 removed from the upper scaffold 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a work scaffold in a boiler used for inspection and repair work of a boiler furnace wall, a boiler water wall replacement device and a replacement method therefor, and in particular, for checking and repairing a large scale coal fired large boiler for thermal power generation. The present invention relates to an in-boiler work scaffold, a boiler water wall replacement device, and a method for replacing the same.

<Coal fired large boiler 1 for thermal power generation>
FIG. 7 is a side view showing a schematic configuration of a large scale coal fired large boiler for thermal power generation. As shown, a large scale coal fired large boiler 1 for thermal power generation is provided with a central portion 3 for accommodating the boiler furnace wall 2 and the cage wall 7 and the like, a front portion 5 for accommodating the cole bunker 4 and the like, and a rear portion for accommodating the air preheater and the like. It consists of six. The boiler furnace wall 2 and the cage wall 7 are hung and supported from a large beam 8 disposed at the top of the boiler frame in a casing (building) of the central portion 3 so that thermal expansion during combustion is dissipated downward.

<Boiler furnace wall 2>
FIG. 8 is a perspective view showing the main configuration of the boiler furnace wall. The boiler furnace wall 2 is divided into an upper casing 200 and a lower casing 220.
The upper housing 200 is configured of a ceiling portion 202, a side wall portion 204, and an internal component, and one side of the side wall portion 204 on four sides is connected to the cage wall 7 side.
The lower housing 220 is composed of water walls on four sides (a can water wall 222, a can water wall 224, and left and right boiler water walls 228 described later), and on the front 5 side of the boiler frame (see FIG. 7) A window box 226 equipped with a number of combustion burners is attached to the can front water wall 222 and the can rear water wall 224 facing the rear side 6 (see FIG. 7). Also, hopper portions 230 are connected to the lower portions of the left and right boiler water walls 228 located on the side adjacent to the can front water wall 222 and the can rear water wall 224, and the opposing hopper portions 230 are connected to each other. The inclined water walls 232 and 234 are connected to the lower ends of the front water wall 222 and the can rear water wall 224, respectively.
The ceiling portion 202, the side wall portion 204, and the water wall of the lower housing 220 of the upper housing 200 are joined by welding together a rectangular water pipe panel (hereinafter referred to simply as a panel) having a side length of about 2 to 3 meters. It is assembled. The boiler furnace wall 2 is formed by connecting the lower end of the side wall portion 204 of the upper housing 200 and the upper end of each boiler water wall of the lower housing 220.

<Working platform for inspection>
The boiler furnace wall 2 of such a configuration is regularly inspected and inspected. In this work, the boiler is first stopped and the furnace is cooled, and then the scaffolding material is carried into the furnace. FIG. 9 is an explanatory view of a basic scaffold structure. The basic configuration of the inspection work scaffold 9 has a lifting support beam 92 suspended from a wire 91, and a plurality of pairs of vertical rods 93 are suspended below the lifting support beam 92, and each pair of vertical rods 93 is suspended. The horizontal rod 94 is fitted. A scaffolding plate 95 is bridged between each horizontal rod 94 to form a second layer scaffold (possibly handrails may be attached). Furthermore, a pair of vertical rods 93 are suspended from the horizontal rod 94 of the second layer, the horizontal rods 94 are fitted in each pair of vertical rods 93, and the scaffold plate 95 is bridged between the horizontal rods 94 to form a third layer. Scaffolding is formed. Similarly, the required number of stages is formed along the inner wall surface of the boiler, and a temporary temporary scaffold is assembled on four sides of the inner wall of the boiler by the multiple-layer scaffold and suspended from the upper beam (eg, patent documents 1).

JP 2004-250944 A

  The work scaffolds for inspection are respectively assembled along the four sides of the inner wall of the boiler, and the end portions of the scaffolds at the four corners of the inner wall are integrally connected by connecting members for each layer and made movable to adjacent walls And the strength and safety are enhanced. The inner wall of the boiler is inspected from above this scaffold. Then, the panel of the defective part of the boiler water wall is cut and replaced with a new panel.

However, since the conventional inspection work scaffolding is formed along the inner surface of the boiler furnace, the gap between the wall surface and the scaffolding is extremely narrow, and the operation when removing a defective panel from the inner wall surface side and attaching a new panel I was unable to secure space. For this reason, the work scaffolding of the boiler water-wall part of a fault location is removed, and the work which is newly assembled is needed, and it became a complicated work in order to require an effort of a worker and to extend it.
In addition, the work scaffolding assembled along the boiler water wall has a structure with steps because there are less interferences compared to the can front water wall and the can back water wall, and while removing this work scaffolding It becomes difficult to move.

  In view of the above-mentioned problems of the prior art, the present invention is an in-boiler work scaffolding capable of easily replacing the boiler water wall even after the work scaffold for inspection is attached to the boiler furnace wall, a boiler water wall replacement device And providing an exchange method.

As a first means for solving the above problems, the present invention comprises upper and lower scaffolds suspended along a boiler water wall in a boiler furnace;
A connecting part capable of attaching and detaching the lower scaffold to the upper scaffold;
A lifting portion extending between the upper and lower scaffolds in a direction intersecting the boiler water wall, and capable of lifting the lower scaffold removed from the upper scaffold and moving away from the boiler water wall;
An in-boiler work scaffold is provided.
According to the first means, even after the work scaffold for inspection is installed, the lower scaffold is moved in the direction away from the boiler water wall to perform panel replacement work between the boiler water wall and the lower scaffold. Space can be provided. Therefore, there is no need to remove and assemble the lower scaffolding at the time of panel replacement, and the boiler water wall can be replaced quickly and efficiently.

As a second means for solving the above problems, according to the present invention, in the first means, the lifting portion is
A monorail extending from the upper scaffolding toward the inside of the boiler furnace;
An object of the present invention is to provide an in-boiler work scaffold including a chain block which is movable back and forth along the longitudinal direction of the monorail and connected to the lower scaffold.
According to the second means, the upper scaffolding is maintained suspended from the upper beam, and only the lower scaffolding is separated from the boiler water wall to provide a space for panel replacement work with the boiler water wall. be able to.

As a third means for solving the above-mentioned problems, according to the present invention, in the first or second means, the connecting portion is provided with a length dimension adjusting portion. It is in providing the work scaffold in a boiler as described in these.
According to the third means, after the load of the lower scaffold is suspended to the chain block, the length dimension of the connecting portion can be changed to release and remove the connection between the lower scaffold and the upper scaffold. Thereby, when inspecting the inside of the boiler furnace, the upper and lower scaffolds can be connected or disconnected at the connection portion. Thereby, at the time of panel replacement work of a boiler water wall, a working space can be secured by releasing / removing the connection part, releasing the lower scaffold from the upper scaffold, and moving it.

As a fourth means for solving the above-mentioned problems, according to the present invention, a can front water wall, a can back water wall facing the can front water wall, and a side adjacent to the can front water wall and the can rear water wall In-boiler work scaffolding provided on a boiler furnace wall consisting of a boiler water wall located at
A fixed work scaffold suspended along the can front water wall or the can rear water wall;
A mobile work platform suspended along the boiler water wall;
Consists of
It is an object of the present invention to provide an in-boiler work scaffold comprising: upper and lower scaffolds; and a lifting part for moving the lower scaffold away from the boiler water wall.
According to the fourth means, even after the work scaffold for inspecting the boiler water wall is installed, the lower scaffold is moved in a direction away from the boiler water wall, and a panel is formed between the boiler water wall and the lower scaffold Space for replacement work can be provided. Therefore, there is no need to remove and assemble the lower scaffolding at the time of panel replacement, and the boiler water wall can be replaced quickly and efficiently.

As a fifth means for solving the above-mentioned problems, the present invention is characterized in that, in the fourth means, the fixed work scaffold has a recess in a space through which the movable work scaffold of the adjacent side moves. It is to provide a working platform within the boiler.
According to the fifth means, the stationary work scaffold can be installed without interfering with the space in which the mobile work scaffold moves.

As a sixth means for solving the above-mentioned problems, the present invention provides a work scaffold in a boiler according to any one of the first to fifth aspects,
An apparatus for replacing a boiler water wall is provided with a panel lifting means for lifting or suspending a panel of a boiler water wall in a space while the lower scaffolding moves in a direction away from the boiler water wall. It is.
According to the above-mentioned sixth means, even after the work scaffold for inspection of the boiler furnace wall is installed, the space for replacement work provided between the boiler water wall and the lower scaffold is easily selected from the boiler water wall. It is possible to carry out replacement work by suspending and lifting the panel to be a part. As a result, it is not necessary to remove and assemble the lower scaffolding, and it is possible to perform panel replacement work in which a part of the boiler water wall is cut in a short time and efficiently.

As a seventh means for solving the above-mentioned problems, the present invention provides, in the sixth means, the panel lifting means,
A beam with a pulley that moves back and forth from the boiler frame to the boiler water wall;
It is an object of the present invention to provide a boiler water wall replacement device including a hoist which rolls up or delivers a wire passing through the pulley with a pulley.
According to the seventh means, by arranging the pulley beam on the side of the boiler frame, interference does not occur in the mounting operation for assembling the upper or lower scaffold and suspending from the upper beam or the inspection operation of the boiler furnace. Further, at the time of replacement work, the space provided between the boiler water wall and the lower scaffolding can carry in or carry out the panel of the boiler water wall without interfering with other structures in the boiler furnace.

As an eighth means for solving the above-mentioned problems, the present invention is characterized in that the upper and lower scaffolds suspended along the boiler water wall in the boiler furnace are released to connect the lower scaffold by the lifting part. Moving the lower scaffolding away from the boiler water wall to provide a space with the boiler water wall;
Suspending and removing a panel obtained by cutting a part of the boiler water wall with a panel lifting means of the space;
Lifting and installing a new panel of the boiler water wall by the panel lifting means;
Providing a method of replacing a boiler water wall characterized by:
According to the eighth means, it is possible to provide a space for panel replacement work between the boiler water wall and the lower scaffold even after the work scaffold for inspection is installed. As a result, it is not necessary to remove and assemble the scaffold near the replacement point of the boiler water wall, and it is possible to perform the replacement work of the panel in which a part of the boiler water wall is cut in a short time and efficiently.

  According to the present invention, even after installing a working scaffold for inspection, a space for replacement work can be provided between the boiler water wall and the lower scaffold, and part of the boiler water wall can be easily cut off Panel replacement work can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS It is the structure schematic of the exchange apparatus of the boiler water wall of this invention. It is operation | movement explanatory drawing of the work scaffold in a boiler. It is a perspective view of a work scaffold for inspection installed in a boiler furnace. It is a top view of the work scaffold for inspection. It is explanatory drawing of the work scaffolding in a boiler seen from the water wall side before cans or cans. It is explanatory drawing of a connection part. It is the side view which showed schematic structure of the coal-fired large boiler for thermal power generation. It is a perspective view showing the main composition of a boiler furnace wall. It is explanatory drawing of a basic scaffold structure.

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the working scaffold in a boiler, the boiler water wall replacement device and the replacement method according to the present invention will be described in detail below with reference to the attached drawings.
FIG. 3 is a perspective view of the inspection work scaffold installed in the boiler furnace. Among the working scaffolds in the boiler, the working scaffolds on the boiler water wall side seen in the side in the figure only show the upper scaffolding and the lower scaffolding is omitted. The panel 96 which can be seen at the position of the lower scaffold shows a state of carrying in (the panel lifting means 20 etc. are omitted). FIG. 4 is a plan view of the inspection work scaffold.

The in-boiler work scaffolding 10 is suspended and installed from the upper girder 8 together with the upper and lower housings 200 and 220 of the boiler furnace wall 2. The in-boiler work scaffold 10 comprises a working scaffold (fixed working scaffold) 11 for the can front water wall 222 and the can back water wall 224 and a working scaffold (mobile working scaffold) 112 for the boiler water wall 228.
The working scaffold 11 of the can front water wall 222 and the can rear water wall 224 installed on the can front water wall 222 and the can rear water wall 224 of the lower housing 220 mainly performs inspection work of the windbox equipped with the combustion burner (See Figure 4).

  Working scaffold 112 for the boiler water wall 228 installed on the left and right boiler water walls 228 located on the side next to the can front water wall 222 and the can back water wall 224, the stairs 97 moving to the upper and lower layers (see FIG. 4) Are mainly installed to perform inspection work of the boiler water wall 228. The boiler water wall 228 is obtained by welding a rectangular panel 96 (hereinafter also referred to as a water pipe panel) having a side length of several meters. Then, when there is a defect in the boiler water wall 228, the panel 96 is cut and a replacement work is performed to weld a new panel 96.

  The basic configuration of the inspection work scaffold 90 has a lifting support beam suspended from the wire as described above, and a plurality of vertical rods are suspended below the lifting support beam, and each pair of vertical rods The horizontal rod is fitted. A scaffold is formed by bridging the scaffolding board between each horizontal rod. Then, the required number of stages is formed along the inner wall surface of the boiler, and a tubular scaffold is assembled on the four surfaces of the inner wall of the boiler by multiple layers of scaffolds, and is suspended and supported from the upper beam

<Boiler water wall replacement device 100>
FIG. 1 is a schematic view of a boiler water wall replacement apparatus according to the present invention. The boiler water wall replacement apparatus 100 according to the present invention is mainly based on the working scaffold 10 in the boiler assembled along the water wall in the boiler furnace and the panel lifting means 20 of the panel 96 which is a component constituting the boiler water wall 228. It has composition.

<Working platform in boiler 10>
FIG. 5 is an explanatory view of the work scaffold in the boiler as viewed from the water wall side before or after the can. The in-boiler work scaffold 10 according to the present invention includes upper and lower scaffolds 12 and 14 suspended along a boiler water wall 228 in a boiler furnace, and a connecting part 16 for connecting or releasing the upper and lower scaffolds 12 and 14; Extending between the upper and lower scaffolds 12 and 14 in the direction intersecting with the boiler water wall 228, and capable of moving the lower scaffold 14 away from the boiler water wall 228;

The upper and lower scaffolds 12 and 14 are scaffolds installed in the vertical direction of the boiler water wall 228. In addition, the work scaffold 11 for inspection of the can front water wall or the can rear water wall is assembled by providing the recess 113 so as not to interfere with the moving lower scaffold 14 in advance.
FIG. 6 is an explanatory view of the connecting portion. A connection 16 is attached between the upper and lower scaffolds 12 and 14. The connection portion 16 is a metal whose upper end is connected to the upper scaffold 12 and whose lower end is connected to the lower scaffold 14 to connect or release the upper and lower scaffolds 12 and 14. A specific connection structure of the connecting portion 16 is, for example, provided with a flange 164 at the connecting portion of the upper and lower scaffolds 12 and 14, and large diameter holes and small diameter holes fitted to the flange 164 at both ends of the connecting portion 16. A daruma shaped hole 162 is provided. At the time of connection, the flange 164 is fitted into the large diameter hole and then moved to the small diameter hole. On the other hand, at the time of opening, the flange 164 can be removed by moving from the small diameter hole to the large diameter hole.

The connecting portion 16 is provided with a length dimension adjusting portion 160. A specific configuration of the adjustment unit 160 is a turnbuckle, and performs length adjustment (adjustment of the length dimension) when the lower scaffold 14 is suspended to the chain block 182.
Further, a lifting portion 18 is attached between the upper and lower scaffolds 12 and 14. The lifting portion 18 is capable of moving forward and backward along the monorail 180 extending from the upper scaffold 12 toward the inner side of the boiler furnace wall 2 and along the longitudinal direction of the monorail 180, and connects the lower scaffold 14 and the monorail 180 It has 182.

The monorail 180 is a rail having one end connected to the lower portion of the upper scaffold 12 and the other end connected to the stage 240 in the boiler furnace and extending horizontally from the boiler furnace wall 2 inward. Further, a stopper 184 is provided at the end of the monorail 180 (inside the boiler furnace), and a handrail 140 is provided on the upper surface of the lower scaffold 14.
The chain block 182 includes a hook 186 coupled to the lower scaffold 14 and a geared trolley 188 moving forward and backward on the monorail 180, and by suspending the lower scaffold 14, the longitudinal direction of the monorail 180, in other words, the boiler water wall 228 Can move away from the The upper and lower scaffolds 12 and 14 are connected to each other only by the connection portion 16 without the lifting portion 18 at the time of connection.
Such gear trolleys 188 can move into the boiler and come into contact with the stoppers 184 to stop the lower scaffold 14 when they reach the end of the monorail 180.
The connecting portion 16 and the lifting portion 18 are attached to a plurality of places between the upper and lower scaffolds 12 and 14 in consideration of the weight of the lower scaffold 14 of the lifting portion 18.

<Panel lifting means 20>
The panel lifting means 20 includes a pulley beam 22 moving forward and backward from the boiler frame 250 toward the boiler water wall 228, and a hoist 25 for winding up or delivering the wire 24 passing through the pulley 23 of the pulley beam 22.
The pulley beam 22 is a beam arranged horizontally in the longitudinal direction to move forward and backward from the boiler frame 250 (panel opening) to the boiler water wall 228 via a roller. A plurality of pulleys 23 are attached to both ends of the beam with pulley 22 and wires 24 are passed through. A hook 27 is provided at the lower end of the wire 24 so as to be connectable to the panel 96, and the upper end side of the wire 24 is connected to a winding machine 25 described later.

As the hoisting machine 25, a winch which is installed in advance in a boiler and used when assembling a work scaffold for inspection can be applied.
When the upper and lower scaffolds 12 and 14 are connected, the panel lifting means 20 having such a configuration is disposed on the boiler frame 250 side. Then, when the lower scaffold 14 is moved in a direction away from the boiler water wall 228 by releasing the connection between the upper and lower scaffolds 12 and 14, the beam with pulley 22 is moved to the boiler water wall 228 side. At this time, the pulley 23 on the side of the boiler water wall 228 is disposed in the space between the boiler water wall 228 and the lower scaffold 14 and can lift or suspend the panel 96 without interfering with the scaffold. .

<Method for replacing boiler water wall>
The boiler water wall replacement method using the boiler water wall replacement device of the present invention according to the above configuration will be described below. FIG. 2 is an operation explanatory view of the movable work scaffold of the boiler furnace.
The inspection and inspection work in the boiler furnace is performed in a state where the upper and lower scaffolds 12 and 14 of the work scaffold 10 in the boiler are connected.
If a defect is found in the boiler water wall 228 as a result of the inspection and inspection work, the following operation is performed.

The lower scaffold 14 is formed into a boiler water wall 228 by a lifting section 18 in which the lower scaffold 14 is suspended by removing the connecting portion 16 connecting the upper and lower scaffolds 12 and 14 suspended along the boiler water wall 228 in the boiler furnace. To move away from the space to provide a space between the boiler water wall 228 (step 1).
Specifically, the hooks 186 of the chain block 182 of the lifting portion 18 are connected to the lower scaffold 14 to lift the lower scaffold 14. As a result, the load of the lower scaffold 14 is not applied to the connection portion 16 and the load is received by the lifting portion 18 (see FIG. 2A).
Next, the length dimension of the connecting portion 16 is extended by the adjusting portion 160 of the connecting portion 16 (see FIG. 2A), and the fitting between the flange 164 and the hook-shaped hole 162 is removed and the connecting portion 16 is removed (see FIG. 2 (B)).

  The lower trolley 14 is moved in the direction away from the boiler water wall 228 along the longitudinal direction of the monorail 180 by the geared trolley 188 of the lifting portion 18. When the gear trolley 188 comes into contact with the stopper 184 at the end of the monorail 180 and stops, a space for replacement work is created between the boiler water wall 228 and the lower scaffold 14 (see FIG. 2C).

A panel obtained by cutting a part of the boiler water wall 228 is suspended and removed by the panel lifting means 20 of the space (step 2).
Specifically, the beam with pulley 22 of the panel lifting means 20 is moved toward the boiler water wall 228 (see FIG. 2C).
The panel 96 at the defective point of the boiler water wall 228 is cut from the outside (boiler frame 250 side) of the boiler water wall 228.
The panel lifting means 20 suspends the cut panel 96 in the space provided in the boiler water wall 228 and the lower scaffold 14. The cut panel 96 is carried out from the opening of the hopper stage (see FIG. 2 (D)).

A new panel 96 of the boiler water wall 228 is lifted and installed by the panel lifting means 20 (step 3).
Specifically, a new panel 96 is carried in from the opening and lifted up by the panel lifting means 20 (see FIG. 2D).
A new panel 96 is welded to the cut panel location.

  According to the present invention as described above, even after the work scaffold for inspection is installed, a space for replacement work can be provided between the boiler water wall and the lower scaffold, and one of the boiler water walls can be easily It is possible to carry out the replacement work of the panel cut part.

1 ... ... coal fired large boiler for thermal power generation,
2 ...... Boiler furnace wall, 200 ...... Upper frame, 202 ...... Ceiling, 204 ...... Side wall, 220 ...... Lower frame, 222 ...... Can front water wall, 224 ...... Can Back water wall, 226: Wind box, 228: Boiler water wall, 230: Hopper part, 232: Inclined water wall, 234: Inclined water wall, 240: Stage, 250: 250 ...... Boiler frame,
3 ...... Central part, 4 ...... コ ー ル バ ン バ ン コ ー ル ... ... 前 部 前 部 前 部 front 6 6 7 rear 7 7 、 cage wall, 8 ...... 大梁,
9 ...... Working scaffold for inspection, 902 ...... Working scaffold for working water wall before can 903 ... Working scaffolding for working water wall, 904 ... Working scaffold for working boiler water wall, 91 ......... ... wire, 92 ... ... lifting support beam, 93 ... ... vertical rod, 94 ... ... horizontal rod, 95 ... ... scaffolding board, 96 ... ... panel, 97 ... ... stairs,
10: Working scaffold in the boiler, 11: Working scaffold for working water wall or can after water wall, 111: Space for lower scaffolding, 112: Working scaffold for working water of boiler water wall, 113 ... ...... Recess,
12 ......... Upper scaffolding,
14 ......... Lower scaffolding, 140 ... ... handrail,
16 ...... Connection portion, 160 ...... Adjustment portion, 162 ............ Daruma-shaped hole, 164 ...... ツ,
18: Lifting part, 180: Monorail, 182: Chain block, 184: Stopper, 186: Hook, 188: Geared trolley,
20 ...... Panel lifting means, 22 ...... Beam with pulley, 23 ...... Pulley, 24 ...... Wire, 25 ...... Winding machine, 27 ...... Hook,
100 ......... The boiler water wall replacement device.

Claims (8)

Upper and lower scaffolds suspended along the boiler water wall in the boiler furnace;
A connecting part capable of attaching and detaching the lower scaffold to the upper scaffold;
A lifting portion extending between the upper and lower scaffolds in a direction intersecting the boiler water wall, and capable of lifting the lower scaffold removed from the upper scaffold and moving away from the boiler water wall;
An in-boiler work scaffold comprising: The lifting portion is
A monorail extending from the upper scaffolding toward the inside of the boiler furnace;
The in-boiler work scaffold according to claim 1, further comprising a chain block that is movable back and forth along the longitudinal direction of the monorail and coupled to the lower scaffold.   The in-boiler work scaffold according to claim 1 or 2, wherein the connection portion includes a length dimension adjustment portion. In-boiler work scaffold provided on a boiler furnace wall consisting of a can front water wall, a can back water wall facing the can front water wall, and a boiler water wall located on the side adjacent to the can front water wall and the can rear water wall In
A fixed work scaffold suspended along the can front water wall or the can rear water wall;
A mobile work platform suspended along the boiler water wall;
Consists of
An in-boiler work scaffold comprising: upper and lower scaffolds; and a lifting part for moving a lower scaffold away from the boiler water wall.   The in-boiler work scaffold according to claim 4, wherein the fixed-type work scaffold has a recess in a space through which the movable work scaffold in the adjacent side moves. The in-boiler work scaffold according to any one of claims 1 to 5;
An apparatus for replacing a boiler water wall, comprising: panel lifting means for lifting or suspending a panel of a boiler water wall in a space while the lower scaffolding moves in a direction away from the boiler water wall. The panel lifting means is
A beam with a pulley that moves back and forth from the boiler frame to the boiler water wall;
7. The boiler water wall replacement apparatus according to claim 6, further comprising a hoist for winding up or delivering a wire passing through the pulley with the pulley. Release the connection of upper and lower scaffolds suspended along the boiler water wall in the boiler furnace, and move the lower scaffold away from the boiler water wall by the lifting section which suspended the lower scaffold, thereby the boiler Providing a space between it and the water wall;
Suspending and removing a panel obtained by cutting a part of the boiler water wall with a panel lifting means of the space;
Lifting and installing a new panel of the boiler water wall by the panel lifting means;
A method of replacing a boiler water wall, comprising: