Electrostatic precipitator and method for repairing the electrostatic precipitator

Abstract

To provide an electric dust collector that can be simply repaired, and a method of repairing the electric dust collector.SOLUTION: The electric dust collector (10) is equipped with a dust collecting plate (20), a discharge electrode (30), a first beam (22), a second beam (32), and a body (12). The dust collecting plate (20) is divided in a vertical direction, and is separably connected with a first member (21) that is the minimum unit of division. The discharge electrode (30) is divided in a vertical direction, and is separably connected with a second member (31) that is the minimum unit of division. The first beam (22) hangs the dust collecting plate (20), and the second beam (32) hangs the discharge electrode (30). The body (12) stores the dust collecting plate (20), the discharge electrode (30), the first beam (22) and the second beam (32).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an electrostatic precipitator and a method for repairing the electrostatic precipitator.

Background Art

[0002] In various facilities in a steelworks (e.g., sintering machines, coke ovens), exhaust gas containing a large amount of dust (particles) such as coal dust and powder dust is generated. From the perspective of environmental protection, it is necessary to collect and remove dust from the exhaust gas. Therefore, a dust collection device is essential. For example, an electrostatic precipitator is installed as the main dust collection device in the exhaust gas path from a sintering machine to a chimney. When a high voltage is applied between the dust collection plate and the discharge electrode inside the main body of the electrostatic precipitator, the dust in the exhaust gas becomes charged, and the dust is attracted to and adheres to the dust collection plate.

[0003] The weight per dust collection plate is, for example, 500 kg, and the weight per discharge electrode is, for example, 50 kg. Usually, large heavy machinery such as a crane is used for carrying in and out the dust collection plates and discharge electrodes. During the construction of the electrostatic precipitator, the upper part of the main body of the electrostatic precipitator is open, and the dust collection plates and discharge electrodes are carried in from there. However, after construction, a rectifier and insulators are installed on the upper part of the main body of the electrostatic precipitator. Therefore, when repairing the electrostatic precipitator, in order to replace the dust collection plates and discharge electrodes, the upper part of the main body of the electrostatic precipitator is once opened using a large heavy machinery, and the dust collection plates and discharge electrodes are carried in and out. In this case, the repair work is very time-consuming.

[0004] On the other hand, Patent Document 1 discloses an electrostatic precipitator including a dust collection plate and a discharge electrode having a slide mechanism that can expand and contract in at least one direction. According to the electrostatic precipitator of Patent Document 1, at the time of repair, the dust collection plate and the discharge electrode can be expanded and contracted in one direction to miniaturize the dust collection plate and the discharge electrode. Thereby, the dust collection plates and discharge electrodes can be carried in and out through a carry-out port (inspection port) provided on the side plate of the electrostatic precipitator. In short, in Patent Document 1, since it is not necessary to open the upper part of the electrostatic precipitator in the repair work, the work load can be reduced.

Prior Art Documents

Patent Document

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In Patent Document 1, although the dust collecting plate and the discharge electrode can be miniaturized, the weights of the dust collecting plate and the discharge electrode cannot be reduced. Therefore, large heavy machinery is still required for the loading and unloading of the dust collecting plate and the discharge electrode. However, after the construction of the electrostatic precipitator, additional equipment is often arranged around the electrostatic precipitator. Then, since there is insufficient working space for large heavy machinery around the electrostatic precipitator, it is very difficult to repair the electrostatic precipitator using large heavy machinery.

[0007] An object of the present disclosure is to provide an electrostatic precipitator that can be easily repaired and a method for repairing the electrostatic precipitator.

Means for Solving the Problems

[0008] The electrostatic precipitator according to the present disclosure includes a dust collecting plate, a discharge electrode, a first beam, a second beam, and a main body. The dust collecting plate is divided in the vertical direction, and the first members, which are the minimum units of the division, are separably connected to each other. The discharge electrode is divided in the vertical direction, and the second members, which are the minimum units of the division, are separably connected to each other. The first beam suspends the dust collecting plate. The second beam suspends the discharge electrode. The main body houses the dust collecting plate, the discharge electrode, the first beam, and the second beam.

[0009] The repair method according to the present disclosure is a repair method for an electrostatic precipitator including a dust collection plate, a discharge electrode, a first beam, a second beam, and a main body. The first beam suspends the dust collection plate. The second beam suspends the discharge electrode. The main body houses the dust collection plate, the discharge electrode, the first beam, and the second beam. The repair method includes an opening process, a dust collection plate removal process, a discharge electrode removal process, a dust collection plate preparation process, a discharge electrode preparation process, a dust collection plate installation process, a discharge electrode installation process, a first suspension process, a first assembly process, a second suspension process, and a second assembly process. In the opening process, an opening is formed at the lower part of the side plate of the main body. In the dust collection plate removal process, the old dust collection plate suspended from the first beam before repair is removed from the first beam and carried out through the opening. In the dust collection plate removal process, the old dust collection plate is removed while lowering the first beam, and finally the first beam is lowered to the height near the opening. In the discharge electrode removal process, the old discharge electrode suspended from the second beam before repair is removed from the second beam and carried out through the opening. In the discharge electrode removal process, the old discharge electrode is removed while lowering the second beam, and finally the second beam is lowered to the height near the opening. In the dust collection plate preparation process, a new dust collection plate is prepared. The new dust collection plate is divided in the vertical direction, and new first members that are the minimum units of division are detachable from each other. In the discharge electrode preparation process, a new discharge electrode is prepared. The new discharge electrode is divided in the vertical direction, and new second members that are the minimum units of division are detachable from each other. In the dust collection plate installation process, the new first members are individually carried into the main body through the opening. In the discharge electrode installation process, the new second members are individually carried into the main body through the opening. In the first suspension process, the new first members of the new dust collection plate are suspended from the first beam. In the first assembly process, a first ascending process and a first attachment process are alternately repeated. In the first ascending process, the first beam is raised. In the first attachment process, a new first member of the new dust collection plate is attached below the lowermost new first member among the new first members suspended from the first beam. In the second suspension process, the new second members of the new discharge electrode are suspended from the second beam. In the second assembly process, a second ascending process and a second attachment process are alternately repeated. In the second ascending process, the second beam is raised. In the second attachment process, a new second member of the new discharge electrode is attached below the lowermost new second member among the new second members suspended from the second beam.

Effect of the Invention

[0010] According to the electric dust collector and the repair method of the electric dust collector according to the present disclosure, repair can be easily performed.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0012] The electric dust collector according to the present embodiment includes a dust collecting plate, a discharge electrode, a first beam, a second beam, and a main body. The dust collecting plate is divided in the vertical direction, and the first members, which are the minimum units of the division, are separably connected to each other. The discharge electrode is divided in the vertical direction, and the second members, which are the minimum units of the division, are separably connected to each other. The first beam suspends the dust collecting plate. The second beam suspends the discharge electrode. The main body houses the dust collecting plate, the discharge electrode, the first beam, and the second beam (the first configuration).

[0013] In the dust collector of the first configuration, the dust collection plate is divided, and the first members are detachably connected to each other. When replacing the dust collection plate, the first beam can be lowered and the plurality of first members can be sequentially separated to remove the dust collection plate. Therefore, if an opening is formed in the side plate of the dust collector, the first members can be individually carried out through the opening. Further, the first members of a new dust collection plate can be individually carried in through the opening, and the first members can be sequentially attached while raising the first beam to assemble the dust collection plate. Since each first member is lighter and smaller than the entire dust collection plate, it is not necessary to use a large crane for carrying out and carrying in the first members. Therefore, the replacement of the dust collection plate can be easily performed.

[0014] Also, in the dust collector of the first configuration, the discharge electrode is divided, and the second members are detachably connected to each other. When replacing the discharge electrode, the second beam can be lowered and the plurality of second members can be sequentially separated to remove the discharge electrode. Therefore, the second members can be individually carried out through the above-described opening. Further, the second members of a new discharge electrode can be individually carried in through the opening, and the second members can be sequentially attached while raising the second beam to assemble the discharge electrode. Since each second member is lighter and smaller than the entire discharge electrode, it is not necessary to use a large crane for carrying out and carrying in the second members. Therefore, the replacement of the discharge electrode can be easily performed. From the above, according to the dust collector of the first configuration, repairs can be easily performed.

[0015] In the dust collector of the first configuration, preferably, the dust collection plate is divided into four or more in the vertical direction. Also, the discharge electrode is divided into four or more in the vertical direction (second configuration).

[0016] In the dust collector of the second configuration, in the vertical direction, the dust collection plate and the discharge electrode are each divided into four or more. By increasing the number of divisions, each of the divided first members and second members can be made even lighter. Thereby, the carrying out and carrying in operations of the first members and the second members can be efficiently performed.

[0017] In the electric dust collector of the first or second configuration, preferably, the dust collection plate is further divided in a lateral direction perpendicular to the vertical direction (third configuration).

[0018] In the electric dust collector of the third configuration, the dust collection plate is divided not only in the vertical direction but also in the lateral direction. In this case, the sizes in both the vertical and lateral directions can be reduced. Then, the opening serving as the carry-in / out port of the first member can also be made small enough for the first member to pass through. When repairing the electric dust collector, forming a large opening in the side plate of the electric dust collector may reduce the strength of the electric dust collector body. According to the third configuration, since the opening formed in the side plate of the electric dust collector can be made small, the strength of the electric dust collector body can be maintained.

[0019] In the electric dust collector of the third configuration, more preferably, the dust collection plate is divided into four or more parts in the lateral direction (fourth configuration).

[0020] In the electric dust collector of the fourth configuration, in the lateral direction, the dust collection plate is divided into four or more parts. By increasing the number of divisions, each of the divided first members can be made even lighter. As a result, the carry-out and carry-in operations of the first member can be performed more efficiently.

[0021] The repair method according to this embodiment is a repair method for an electrostatic precipitator including a dust collecting plate, a discharge electrode, a first beam, a second beam, and a main body. The first beam suspends the dust collecting plate. The second beam suspends the discharge electrode. The main body houses the dust collecting plate, the discharge electrode, the first beam, and the second beam. The repair method includes an opening process, a dust collecting plate removal process, a discharge electrode removal process, a dust collecting plate preparation process, a discharge electrode preparation process, a dust collecting plate installation process, a discharge electrode installation process, a first suspension process, a first assembly process, a second suspension process, and a second assembly process. In the opening process, an opening is formed at the lower part of the side plate of the main body. In the dust collecting plate removal process, the old dust collecting plate suspended from the first beam before repair is removed from the first beam and carried out through the opening. In the dust collecting plate removal process, the removal of the old dust collecting plate is carried out while lowering the first beam, and finally the first beam is lowered to the height near the opening. In the discharge electrode removal process, the old discharge electrode suspended from the second beam before repair is removed from the second beam and carried out through the opening. In the discharge electrode removal process, the removal of the old discharge electrode is carried out while lowering the second beam, and finally the second beam is lowered to the height near the opening. In the dust collecting plate preparation process, a new dust collecting plate is prepared. The new dust collecting plate is divided in the vertical direction, and the new first members, which are the minimum units of division, are detachable from each other. In the discharge electrode preparation process, a new discharge electrode is prepared. The new discharge electrode is divided in the vertical direction, and the new second members, which are the minimum units of division, are detachable from each other. In the dust collecting plate installation process, the new first members are individually carried into the main body through the opening. In the discharge electrode installation process, the new second members are individually carried into the main body through the opening. In the first suspension process, the new first members of the new dust collecting plate are suspended from the first beam. In the first assembly process, the first lifting process and the first attachment process are alternately repeated. In the first lifting process, the first beam is lifted. In the first attachment process, the new first members of the new dust collecting plate are attached below the lowermost new first member among the new first members suspended from the first beam. In the second suspension process, the new second members of the new discharge electrode are suspended from the second beam. In the second assembly process, the second lifting process and the second attachment process are alternately repeated. In the second lifting process, the second beam is lifted. In the second attachment process, the new second members of the new discharge electrode are attached below the lowermost new second member among the new second members suspended from the second beam (the fifth configuration).

[0022] In the repair method of the electrostatic precipitator according to the fifth configuration, the replacement of the dust collecting plate is performed according to the following procedure. In the opening step, an opening is formed in the lower part of the side plate of the main body. In the dust collecting plate removal step, while lowering the first beam, a plurality of old dust collecting plates suspended from the first beam before repair are sequentially removed and carried out through the opening. In the dust collecting plate preparation step, a new dust collecting plate that is divided in the vertical direction and in which new first members are detachable from each other is prepared. In the dust collecting plate carrying-in step, the new first members are individually carried into the main body through the opening. In the first hanging step, the new first members of the new dust collecting plate are suspended from the first beam. In the first assembling step, while raising the first beam, another new first member is sequentially attached below the lowermost new first member among the new first members suspended from the first beam. In the replacement operation of the dust collecting plate described above, there is no need to use large heavy machinery. Therefore, the replacement of the dust collecting plate can be easily performed.

[0023] In the repair method of the electrostatic precipitator according to the fifth configuration, the replacement of the discharge electrode is performed according to the following procedure. In the opening step, an opening is formed in the lower part of the side plate of the main body. In the discharge electrode removal step, while lowering the second beam, a plurality of old discharge electrodes suspended from the second beam before repair are sequentially removed and carried out through the opening. In the discharge electrode preparation step, a new discharge electrode that is divided in the vertical direction and in which new second members are detachable from each other is prepared. In the discharge electrode carrying-in step, the new second members are individually carried into the main body through the opening. In the second hanging step, the new second members of the new discharge electrode are suspended from the second beam. In the second assembling step, while raising the second beam, another new second member is sequentially attached below the lowermost new second member among the new second members suspended from the second beam. In the replacement operation of the discharge electrode described above, there is no need to use large heavy machinery. Therefore, the replacement of the discharge electrode can be easily performed. From the above, according to the repair method of the fifth configuration, the repair can be easily performed.

[0024] The repair method of the fifth configuration may include the following configuration. The old dust collecting plate suspended from the first beam before repair is divided in the vertical direction, and the old first members, which are the minimum units of division, are separably connected to each other. The old discharge electrode suspended from the second beam before repair is divided in the vertical direction, and the old second members, which are the minimum units of division, are separably connected to each other. In the dust collecting plate removal process, the first removal process and the first lowering process are repeated alternately. In the first removal process, the lowermost old first member among the old first members of the old dust collecting plate suspended from the first beam is removed. In the first lowering process, the first beam is lowered. In the discharge electrode removal process, the second removal process and the second lowering process are repeated alternately. In the second removal process, the lowermost old second member among the old second members of the old discharge electrode suspended from the second beam is removed. In the second lowering process, the second beam is lowered (the sixth configuration).

[0025] In the repair method of the sixth configuration, the old dust collecting plate before repair is divided in the vertical direction, and the old first members are separably connected to each other. Thereby, in the dust collecting plate removal process, the old dust collecting plate can be disassembled into each old first member simply by removing the connection between the old first members. Therefore, the removal work of the old dust collecting plate can be performed more simply.

[0026] Furthermore, in the repair method of the sixth configuration, the old discharge electrode before repair is divided in the vertical direction, and the old second members are separably connected to each other. Thereby, in the discharge electrode removal process, the old discharge electrode can be disassembled into each old second member simply by removing the connection between the old second members. Therefore, the removal work of the old discharge electrode can be performed more simply.

[0027] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The same or corresponding components in each figure are denoted by the same reference numerals, and the same description will not be repeated.

[0028] 〔Electrostatic Precipitator〕 FIG. 1 is a schematic diagram of the dust collector 10 according to the present embodiment. In FIG. 1, the inside of the dust collector 10 is shown. Referring to FIG. 1, the dust collector 10 includes a main body 12 and an insulator chamber 11 located above the ceiling 121 of the main body 12. Inside the main body 12, a plurality of dust collecting plates 20 and discharge electrodes 30 are arranged at intervals along the flow path direction of the exhaust gas described later.

[0029] The dust collector 10 is used for collecting dust from exhaust gas discharged from facilities such as a sintering machine and a coke oven. In FIG. 1, the main flow of the exhaust gas is indicated by a thick arrow. The exhaust gas is introduced into the dust collector 10 through the inlet duct 13. After the dust contained in the exhaust gas is collected by the dust collecting plate 20 in the dust collector 10, the exhaust gas is discharged to the outside of the dust collector 10 through the outlet duct 14. The dust adhering to the dust collecting plate 20 is shaken off onto the hopper 15 installed below the main body 12, for example, by applying an impact to the dust collecting plate 20 with a hammering device (not shown). The dust is discharged from the hopper 15 to the outside of the dust collector 10.

[0030] An insulator 16 is accommodated in the insulator chamber 11 of the dust collector 10. The discharge electrode 30 is supported by the insulator 16 and insulated from the main body. In addition to the insulator 16, a rectifier, electrical equipment, etc. may be accommodated in the insulator chamber 11.

[0031] FIG. 2 is a view showing the dust collecting plate 20 of the dust collector 10 according to the present embodiment. FIG. 3 is a side view of the dust collecting plate 20 shown in FIG. 2. Referring to FIGS. 2 and 3, the dust collecting plate 20 is suspended from the first beam 22. The dust collecting plate 20 and the first beam 22 are connected by bolts via, for example, a fixing plate 23. The first beam 22 may be attached to a fixture (not shown) suspended from the ceiling 121 of the main body 12.

[0032] The dust collecting plate 20 is divided in the vertical direction and the horizontal direction. Here, the vertical direction is the longitudinal direction of the dust collecting plate 20, corresponding to the vertical direction in the state where the dust collecting plate 20 is suspended from the first beam 22. The horizontal direction is the width direction of the dust collecting plate 20 and is perpendicular to the vertical direction.

[0033] In the example of this embodiment, the dust collecting plate 20 is divided into seven parts in the vertical direction and five parts in the horizontal direction. However, the number of divisions of the dust collecting plate 20 in the vertical and horizontal directions is not limited to this. The dust collecting plate 20 is preferably divided into four or more parts in the vertical direction, more preferably divided into 4 to 8 parts. Also, the dust collecting plate 20 is preferably divided into four or more parts in the horizontal direction, more preferably divided into 4 to 6 parts.

[0034] The dust collecting plate 20 is divided into a plurality of first members 21. The first member 21 is the minimum unit of division of the dust collecting plate 20. The first member 21 may be a corrugated steel sheet or a corrugated plate. The dimension in the vertical direction per one first member 21 is, for example, 1800 mm, and the dimension in the horizontal direction is, for example, 875 mm.

[0035] Adjacent first members 21 are connected to each other in a separable manner. The connection method between the first members 21 is not particularly limited. However, when connecting, it is necessary to keep the distance between the dust collecting plate 20 and the discharge electrode 30 within a specified range. For example, when connecting the first members 21 by welding, the first member 21 may be curved due to thermal deformation, and the separation distance between the dust collecting plate 20 and the discharge electrode 30 cannot be maintained. Therefore, the first members 21 are preferably connected by bolts via a fixing plate 23. The number of fixing plates 23 and the number of bolts for connecting two first members 21 are not particularly limited, and may be appropriately set according to the weight of the dust collecting plate 20, the first member 21, etc.

[0036] FIG. 4 is a view showing the discharge electrode 30 of the electrostatic precipitator 10 according to this embodiment. FIG. 4 shows the state of two discharge electrodes 30 arranged side by side. FIG. 5 is a cross-sectional view taken along line V-V of FIG. 4. Referring to FIG. 4, the discharge electrode 30 is suspended from a second beam 32. The discharge electrode 30 and the second beam 32 are connected by bolts via a fixing plate 33, for example. The second beam 32 may be attached to a fixture (not shown) suspended from the insulator 16.

[0037] The discharge electrode 30 is divided in the vertical direction. Here, the vertical direction is the longitudinal direction of the discharge electrode 30 and corresponds to the up-and-down direction in the state where the discharge electrode 30 is suspended from the second beam 32.

[0038] In the example of this embodiment, the discharge electrode 30 is divided into six in the vertical direction. However, the number of divisions in the vertical direction of the discharge electrode 30 is not limited to this. The discharge electrode 30 is preferably divided into four or more in the vertical direction, more preferably divided into 4 to 8. In this embodiment, since the discharge electrode 30 is rod-shaped as a whole, it is only divided in the vertical direction. When the discharge electrode 30 has a wide shape, it may also be divided in the horizontal direction.

[0039] The discharge electrode 30 is divided into a plurality of second members 31. The second member 31 is the minimum unit of division in the discharge electrode 30. Referring to FIGS. 4 and 5, the second member 31 includes a main member 311 and a plurality of discharge plates 312. In the example of this embodiment, the main member 311 is an angle member extending in the up-and-down direction and is joined to the plate-shaped discharge plate 312. The plurality of discharge plates 312 are joined to the main member 311 at intervals in the up-and-down direction. The dimension in the vertical direction per one second member 31 is, for example, 2000 mm.

[0040] Adjacent second members 31 are connected to be separable from each other. In this embodiment, adjacent second members 31 are connected such that the directions of the main members 311 are staggered. When connecting, it is necessary to maintain the separation distance between the dust collecting plate 20 and the discharge electrode 30 as described above. Therefore, the second members 31 are preferably connected by bolts via a fixing plate 33. The number of fixing plates 33 and the number of bolts for connecting two second members 31 are not particularly limited and may be appropriately set according to the weight of the discharge electrode 30, the second member 31, etc.

[0041] 〔Repair method〕 FIG. 6 is a flowchart showing a repair method for the dust collector 10 according to the present embodiment. As shown in FIG. 6, the repair method of the present embodiment includes an opening step (#5), a carrying-out step (#10), a preparation step (#15), and a carrying-in step (#20). By this repair method, the old dust collection plate 20a and the old discharge electrode 30a before repair installed in the main body 12 of the dust collector 10 can be replaced with new dust collection plates 20b and new discharge electrodes 30b, respectively. Here, the old dust collection plate 20a and the new dust collection plate 20b have the same configuration as the dust collection plate 20 described above, and the old discharge electrode 30a and the new discharge electrode 30b have the same configuration as the discharge electrode 30 described above. Hereinafter, each step shown in FIG. 6 will be specifically described.

[0042] 〔Opening step (#5)〕 In the opening step (#5), an opening 17 is formed at the lower part of the main body 12 of the dust collector 10. Specifically, a part of the side plate 122 of the main body 12 is cut out. FIG. 7 shows the state of the dust collector 10 after the opening 17 is formed. FIG. 7 is a schematic diagram of the dust collector 10 according to the present embodiment. In FIG. 7, the external appearance of the dust collector 10 is shown.

[0043] The opening 17 is used as a carry-in / carry-out port for each member (the first member 21 and the second member 31) in the subsequent carrying-out step (#10) and carrying-in step (#20). The opening 17 may have a size that allows each member to pass through. For example, it may be 1800 mm in the vertical direction and 1200 mm in the horizontal direction. After the repair work of the dust collector 10 is completed, a plate having the same size as the opening 17 may be welded to the side plate 122 of the main body 12 for repair.

[0044] 〔Carrying-out step (#10)〕 The removal process (#10) includes a dust collecting plate removal process (#10a) and a discharge electrode removal process (#10b). In the dust collecting plate removal process (#10a), while lowering the first beam 22, the removal of the old dust collecting plate 20a is carried out, and the plurality of old dust collecting plates 20a suspended from the first beam 22 are sequentially removed from the first beam 22. Specifically, a first removal process of removing the lowermost old first member 21a among the old first members 21a of the old dust collecting plate 20a and a first lowering process of lowering the first beam 22 are alternately repeated. Finally, the first beam 22 is lowered to a height near the opening 17. Then, the removed old dust collecting plates 20a are carried out from the opening 17.

[0045] In the discharge electrode removal process (#10b), while lowering the second beam 32, the removal of the old discharge electrode 30a is carried out, and the plurality of old discharge electrodes 30a suspended from the second beam 32 are sequentially removed from the second beam 32. Specifically, a second removal process of removing the lowermost old second member 31a among the old second members 31a of the old discharge electrode 30a and a second lowering process of lowering the second beam 32 are alternately repeated. Finally, the second beam 32 is lowered to a height near the opening 17. Then, the removed old discharge electrodes 30a are carried out from the opening 17.

[0046] The means for lowering the first beam 22 and the second beam 32 is not particularly limited. For example, a chain block, a winch, etc. can be used. In this case, for example, a chain block is installed on the frame of the ceiling 121, and the chain of the chain block is attached to the first beam 22. Then, the fixing of the first beam 22 is removed and it is lowered. Also, the chain of the chain block installed on the frame of the ceiling 121 is attached to the second beam 32. Then, the fixing of the second beam 32 is removed and it is lowered.

[0047] In the repair method according to this embodiment, the old dust collecting plate 20a and the old discharge electrode 30a before repair have the same configuration as the dust collecting plate 20 and the discharge electrode 30 described above. However, the old dust collecting plate 20a and the old discharge electrode 30a before repair do not necessarily have the same configuration as the dust collecting plate 20 and the discharge electrode 30. In short, the old dust collecting plate 20a and the old discharge electrode 30a before repair may not be divided. In that case, in the dust collecting plate unloading process (#10a), while lowering the first beam 22, the old dust collecting plate 20a is cut to divide the old dust collecting plate 20a in the vertical direction. Also, in the discharge electrode unloading process (#10b), while lowering the second beam 32, the old discharge electrode 30a is cut to divide the old dust collecting plate 20a in the vertical direction. The cutting method is, for example, gas cutting.

[0048] 〔Preparation process (#15)〕 The preparation process (#15) includes a dust collecting plate preparation process (#15a) and a discharge electrode preparation process (#15b). In the dust collecting plate preparation process (#15a), a new dust collecting plate 20b is prepared. The new first members 21b, which are the minimum units of division of the new dust collecting plate 20b, are detachable from each other. In the discharge electrode preparation process (#15b), a new discharge electrode 30b is prepared. The new second members 31b, which are the minimum units of division of the new discharge electrode 30b, are detachable from each other.

[0049] 〔Loading process (#20)〕 The loading process (#20) includes a dust collecting plate loading process (#20a), a discharge electrode loading process (#20b), a first hanging process (#25a), a first assembling process (#30a), a second hanging process (#25b), and a second assembling process (#30b).

[0050] In the dust collecting plate loading process (#20a), the new dust collecting plate 20b prepared in the dust collecting plate preparation process (#15a) is loaded into the main body 12. In the dust collecting plate loading process (#20a), each of the new first members 21b is loaded through the opening 17 formed in the opening process (#5) in a state where the new first members 21b are individually separated.

[0051] In the discharge electrode loading process (#20b), the new discharge electrode 30b prepared in the discharge electrode preparation process (#15b) is loaded into the main body 12. In the discharge electrode loading process (#20b), each of the new second members 31b is loaded through the opening 17 formed in the opening process (#5) in a state where the new second members 31b are individually separated.

[0052] In the first hanging process (#25a), the new first member 21b loaded in the dust collecting plate loading process (#20a) is hung on the first beam 22. In the first assembling process (#30a), while raising the first beam 22, a plurality of new dust collecting plates 20b are sequentially attached to the first beam 22. Specifically, a first attaching step of attaching a new first member 21b below the lowermost new first member 21b among the new first members 21b hung on the first beam 22, and a first raising step of raising the first beam 22 are alternately repeated. Finally, the first beam 22 is raised to the same height as before repair, and the first beam 22 is fixed to the fixture.

[0053] In the second hanging process (#25b), the new second member 31b loaded in the discharge electrode loading process (#20b) is hung on the second beam 32. In the second assembling process (#30b), while raising the second beam 32, a plurality of new discharge electrodes 30b are sequentially attached to the second beam 32. Specifically, a second attaching step of attaching a new second member 31b below the lowermost new second member 31b among the new second members 31b hung on the second beam 32, and a second raising step of raising the second beam 32 are alternately repeated. Finally, the second beam 32 is raised to the same height as before repair, and the second beam 32 is fixed to the fixture.

[0054] An example of the repair method of the electrostatic precipitator 10 has been described above. However, the order of performing each step is not limited to this. For example, after performing the dust collecting plate unloading step (#10a), the dust collecting plate preparation step (#15a), the dust collecting plate loading step (#20a), the first hanging step (#25a), and the first assembling step (#30a), the discharge electrode unloading step (#10b), the discharge electrode preparation step (#15b), the discharge electrode loading step (#20b), the second hanging step (#25b), and the second assembling step (#30b) may be performed. In short, the replacement of the dust collecting plate 20 and the discharge electrode 30 does not necessarily have to be carried out simultaneously, and one of them may be replaced first and then the other.

[0055] Also, in the repair method of the electrostatic precipitator 10 described above, all of the divided dust collecting plates 20 (each first member 21) and discharge electrodes 30 (each second member 31) were replaced. However, in one dust collecting plate 20, if only some of the first members 21 are deteriorated, only the deteriorated first members 21 may be replaced. Similarly, for the discharge electrode 30, if only some of the second members 31 are deteriorated, only the second members 31 may be replaced.

[0056] [Effect] In the repair method of the dust collector 10 according to this embodiment, the replacement of the dust collection plate 20 is performed in the following procedure. In the opening process (#5), an opening 17 is formed in the lower part of the side plate 122 of the main body 12. In the dust collection plate removal process (#10a), while lowering the first beam 22, a plurality of old dust collection plates 20a suspended from the first beam 22 before repair are sequentially removed and carried out through the opening 17. In the dust collection plate preparation process (#15a), a new dust collection plate 20b that is divided in the vertical direction and in which the new first members 21b are detachable from each other is prepared. In the dust collection plate loading process (#20a), the new first members 21b are individually loaded into the main body 12 through the opening 17. In the first suspension process (#25a), the new first members 21b of the new dust collection plate 20b are suspended from the first beam 22. In the first assembly process (#30a), while raising the first beam 22, another new first member 21b is sequentially attached below the lowermost new first member 21b among the new first members 21b suspended from the first beam 22. In the replacement operation of the dust collection plate 20 described above, it is not necessary to use large construction machinery. Therefore, the replacement of the dust collection plate 20 can be easily performed.

[0057] In the repair method of the electrostatic precipitator 10 according to this embodiment, the replacement of the discharge electrode 30 is performed in the following procedure. In the opening step (#5), an opening 17 is formed at the lower part of the side plate 122 of the main body 12. In the discharge electrode removal step (#10b), while lowering the second beam 32, a plurality of old discharge electrodes 30a suspended from the second beam 32 before repair are sequentially removed and carried out through the opening 17. In the discharge electrode preparation step (#15b), a new discharge electrode 30b that is divided in the vertical direction and in which the new second members 31b are detachable from each other is prepared. In the discharge electrode carrying-in step (#20b), the new second members 31b are individually carried into the main body 12 through the opening 17. In the second suspension step (#25b), the new second members 31b of the new discharge electrode 30b are suspended from the second beam 32. In the second assembly step (#30b), while raising the second beam 32, another new second member 31b is sequentially attached below the lowermost new second member 31b among the new second members 31b suspended from the second beam 32. In the replacement operation of the discharge electrode 30 described above, it is not necessary to use a large heavy machine. Therefore, the replacement of the discharge electrode 30 can be easily performed. From the above, according to the repair method of the electrostatic precipitator 10 of this embodiment, the repair can be easily performed.

[0058] In the repair method of the electrostatic precipitator 10 according to this embodiment, the old dust collection plate 20a before repair and the new dust collection plate 20b after repair are each divided in the vertical and horizontal directions. Also, the old discharge electrode 30a before repair and the new discharge electrode 30b after repair are each divided in the vertical direction. Since the divided members are lighter and smaller than the undivided dust collection plate 20 and discharge electrode 30, the carrying-out and carrying-in operations of each member can be efficiently performed. Also, in the opening step (#5), the opening 17 may be formed to be large enough to allow each member to pass through. Therefore, the opening 17 formed in the repair work can be small, and the strength of the main body 12 of the electrostatic precipitator 10 can be maintained.

[0059] The embodiments of the present disclosure have been described above. However, the above-described embodiments are merely examples for implementing the present disclosure. Therefore, the present disclosure is not limited to the above-described embodiments, and the above-described embodiments can be appropriately modified and implemented without departing from the spirit thereof.

[0060] In the above-described embodiment, the dust collecting plate 20 is divided both in the vertical direction and in the horizontal direction. However, the dust collecting plate 20 may be divided only in the vertical direction. Even in this case, when replacing the dust collecting plate 20, it is possible to remove the dust collecting plate 20 by sequentially separating a plurality of first members 21 while lowering the first beam 22.

Explanation of Reference Numerals

[0061] 10: Electrostatic precipitator 12: Main body 122: Side plate 17: Opening 20: Dust collecting plate 21: First member 22: First beam 30: Discharge electrode 31: Second member 32: Second beam

Claims

1. A dust collecting plate divided in the vertical direction, wherein first members, which are the minimum units of the division, are detachably connected to each other; the dust collecting plate; A discharge electrode divided in the vertical direction, wherein second members, which are the minimum units of the division, are detachably connected to each other; the discharge electrode; A first beam for suspending the dust collecting plate; A second beam for suspending the discharge electrode; A main body for accommodating the dust collecting plate, the discharge electrode, the first beam, and the second beam; and an electric dust collector comprising the same. The electric dust collector, wherein the dust collecting plate is further divided in a horizontal direction perpendicular to the vertical direction.

2. The electric dust collector according to Claim 1, wherein the dust collecting plate is divided into four or more parts in the vertical direction, and the discharge electrode is divided into four or more parts in the vertical direction.

3. The electric dust collector according to Claim 1, wherein the dust collecting plate is divided into four or more parts in the horizontal direction.

4. A repair method for an electric dust collector comprising a dust collecting plate, a discharge electrode, a first beam for suspending the dust collecting plate, a second beam for suspending the discharge electrode, and a main body for accommodating the dust collecting plate, the discharge electrode, the first beam, and the second beam, an opening step of forming an opening at a lower part of a side plate of the main body; a dust collecting plate unloading step of removing an old dust collecting plate suspended from the first beam before repair from the first beam and unloading the same through the opening, wherein the old dust collecting plate is removed while lowering the first beam, and finally the first beam is lowered to a height near the opening; the dust collecting plate unloading step; a discharge electrode unloading step of removing an old discharge electrode suspended from the second beam before repair from the second beam and unloading the same through the opening, wherein the old discharge electrode is removed while lowering the second beam, and finally the second beam is lowered to a height near the opening; the discharge electrode unloading step; a dust collecting plate preparation step of preparing a new dust collecting plate divided in the vertical direction, wherein new first members, which are the minimum units of the division, are detachable from each other; a discharge electrode preparation step of preparing a new discharge electrode divided in the vertical direction, wherein new second members, which are the minimum units of the division, are detachable from each other; a dust collecting plate loading step of individually loading the new first members into the main body through the opening; a discharge electrode loading step of individually loading the new second members into the main body through the opening; a first hanging step of hanging the new first members of the new dust collecting plate on the first beam; A first assembling step of alternately repeating a first rising step and a first attaching step, wherein in the first rising step, the first beam is raised, and in the first attaching step, the new first member of the new dust collecting plate is attached below the lowermost new first member among the new first members suspended from the first beam. The first assembling step, A second suspending step of suspending the new second member of the new discharge electrode from the second beam, A second assembling step of alternately repeating a second rising step and a second attaching step, wherein in the second rising step, the second beam is raised, and in the second attaching step, the new second member of the new discharge electrode is attached below the lowermost new second member among the new second members suspended from the second beam. The second assembling step, A method for repairing an electrostatic precipitator comprising the above steps.

5. A method for repairing an electrostatic precipitator according to claim 4, The old dust collecting plate suspended from the first beam before repair is divided in the vertical direction, and the old first members, which are the minimum units of division, are separably connected to each other. The old discharge electrode suspended from the second beam before repair is divided in the vertical direction, and the old second members, which are the minimum units of division, are separably connected to each other. In the dust collecting plate removal step, a first removal step of removing the lowermost old first member among the old first members of the old dust collecting plate suspended from the first beam and a first lowering step of lowering the first beam are alternately repeated. In the discharge electrode removal step, a second removal step of removing the lowermost old second member among the old second members of the old discharge electrode suspended from the second beam and a second lowering step of lowering the second beam are alternately repeated. A method for repairing an electrostatic precipitator.

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