JP7709045B2 - Electrostatic precipitator and method for repairing electrostatic precipitator - Google Patents

Description

This disclosure relates to an electrostatic precipitator and a method for repairing an electrostatic precipitator.

Various equipment in steelworks (e.g. sintering machines, coke ovens) produces exhaust gas containing large amounts of dust (particles) such as soot and fine dust. From the perspective of environmental conservation, it is necessary to capture and remove the dust from the exhaust gas. For this purpose, dust collectors are essential. For example, an electrostatic precipitator is installed as the main dust collector in the exhaust gas path from the sintering machine to the chimney. When a high voltage is applied between the dust collecting plate and the discharge electrode inside the main body of the electrostatic precipitator, the dust in the exhaust gas becomes electrically charged, and the dust is attracted to and adheres to the dust collecting plate.

The weight of each dust collecting plate is, for example, 500 kg, and the weight of each discharge electrode is, for example, 50 kg. Usually, large heavy machinery such as a crane is used to transport the dust collecting plates and discharge electrodes. When constructing an electric dust collector, the top of the electric dust collector body is opened, and the dust collecting plates and discharge electrodes are transported from there. However, after construction, a rectifier and insulators are installed on the top of the electric dust collector body. Therefore, when repairing an electric dust collector, in order to replace the dust collecting plates and discharge electrodes, the top of the electric dust collector body is opened once using large heavy machinery, and the dust collecting plates and discharge electrodes are transported out and brought in. In this case, the repair work is very time-consuming.

In response to this, Patent Document 1 discloses an electric dust collector including a dust collecting plate and a discharge electrode having a slide mechanism that can expand and contract in at least one direction. According to the electric dust collector of Patent Document 1, the dust collecting plate and the discharge electrode can be expanded and contracted in one direction during repair work, making the dust collecting plate and the discharge electrode smaller. This allows the dust collecting plate and the discharge electrode to be carried in and out through an exit (inspection hatch) provided on the side plate of the electric dust collector. In short, with Patent Document 1, there is no need to open the top of the electric dust collector during repair work, which reduces the workload.

JP 2020-81903 A

In Patent Document 1, although the dust collecting plate and the discharge electrode can be made smaller, the weight of the dust collecting plate and the discharge electrode cannot be reduced. Therefore, large heavy machinery is still required to transport the dust collecting plate and the discharge electrode. However, after the construction of the electrostatic precipitator, additional equipment is often placed around the electrostatic precipitator. In such cases, there is a shortage of working space for the large heavy machinery around the electrostatic precipitator, making it very difficult to repair the electrostatic precipitator using the large heavy machinery.

The purpose of this disclosure is to provide an electrostatic precipitator that can be easily repaired, and a method for repairing an electrostatic precipitator.

The electric dust collector according to the present disclosure comprises 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 smallest units of division, are connected to each other so as to be separable from each other. The discharge electrode is divided in the vertical direction, and the second members, which are the smallest units of division, are connected to each other so as to be separable from 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 repair method according to the present disclosure is a method for repairing an electric dust collector 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 carrying-out process, a discharge electrode carrying-out process, a dust collecting plate preparation process, a discharge electrode preparation process, a dust collecting plate carrying-in process, a discharge electrode carrying-in process, a first hanging process, a first assembly process, a second hanging process, and a second assembly process. In the opening process, an opening is formed in the lower part of the side plate of the main body. In the dust collecting plate carrying-out 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 carrying-out process, the old dust collecting plate is removed while the first beam is lowered, and finally the first beam is lowered to a height near the opening. In the discharge electrode carrying-out 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 carrying-out process, the old discharge electrode is removed while the second beam is lowered, and finally the second beam is lowered to a 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 new first members, which are the smallest unit 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, which are the smallest unit of division, are detachable from each other. In the dust collecting plate carrying-in process, the new first members are carried into the main body individually through the opening. In the discharge electrode carrying-in process, the new second members are carried into the main body individually through the opening. In the first hanging process, the new first member of the new dust collecting plate is hung from the first beam. In the first assembly process, the first lifting process and the first mounting process are alternately repeated. In the first lifting process, the first beam is lifted. In the first mounting process, the new first member of the new dust collecting plate is mounted below the new first member that is located at the bottom among the new first members hung from the first beam. In the second hanging process, the new second member of the new discharge electrode is hung from the second beam. In the second assembly process, the second lifting process and the second mounting process are alternately repeated. In the second lifting process, the second beam is lifted. In the second mounting process, the new second member of the new discharge electrode is mounted below the new second member that is located at the bottom among the new second members hung from the second beam.

The electrostatic precipitator and electrostatic precipitator repair method disclosed herein allows repairs to be performed easily.

FIG. 1 is a schematic diagram of an electric dust collector according to the present embodiment. FIG. 2 is a diagram showing a dust collecting plate of the electric dust collector according to this embodiment. FIG. 3 is a side view of the dust collecting plate shown in FIG. FIG. 4 is a diagram showing the discharge electrode of the electric dust collector according to this embodiment. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a flow chart showing the method for repairing an electric dust collector according to this embodiment. FIG. 7 is a schematic diagram of an electric dust collector according to this embodiment.

The electric dust collector according to this 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 smallest units of division, are connected to each other so as to be separable from each other. The discharge electrode is divided in the vertical direction, and the second members, which are the smallest units of division, are connected to each other so as to be separable from 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 (first configuration).

In the electrostatic precipitator of the first configuration, the dust collecting plate is divided, and the first members are connected so as to be separable from each other. When replacing the dust collecting plate, the first beam is lowered while the multiple first members are separated in sequence to remove the dust collecting plate. Therefore, if an opening is formed in the side plate of the electrostatic precipitator, the first members can be individually removed through the opening. Furthermore, the first members of a new dust collecting plate can be individually brought in through the opening, and the first beam is raised while the first members are attached in sequence to perform the assembly of the dust collecting plate. Since each first member is lighter and smaller than the entire dust collecting plate, there is no need to use large heavy machinery to carry the first members in and out. Therefore, the dust collecting plate can be easily replaced.

In the electrostatic precipitator of the first configuration, the discharge electrode is divided, and the second members are connected so as to be separable from each other. When replacing the discharge electrode, the second beam is lowered while separating the second members one by one, and the discharge electrode can be removed. Therefore, the second members can be individually carried out through the opening described above. Furthermore, the second members of a new discharge electrode can be individually carried in through the opening, and the second beam is raised while attaching the second members one by one, and the discharge electrode can be assembled. Since each second member is lighter and smaller than the entire discharge electrode, it is not necessary to use large heavy machinery to carry out and carry in the second members. Therefore, the discharge electrode can be easily replaced. As described above, the electrostatic precipitator of the first configuration allows easy repair.

In the electrostatic precipitator of the first configuration, the dust collecting plate is preferably divided into four or more parts in the vertical direction. Also, the discharge electrode is divided into four or more parts in the vertical direction (second configuration).

In the electrostatic precipitator of the second configuration, the dust collecting plate and the discharge electrode are each divided into four or more parts in the vertical direction. By increasing the number of divisions, each of the divided first and second members can be made even lighter. This allows the first and second members to be transported in and out more efficiently.

In the electrostatic precipitator of the first or second configuration, the dust collecting plate is preferably further divided in a horizontal direction perpendicular to the vertical direction (third configuration).

In the third configuration of the electric dust collector, the dust collecting plate is divided not only vertically but also horizontally. In this case, the size can be reduced in both the vertical and horizontal directions. Then, the opening that serves as the entrance and exit for the first member can also be made small enough to allow the first member to pass through. When repairing an electric dust collector, if a large opening is made in the side plate of the electric dust collector, there is a risk that the strength of the electric dust collector body will be reduced. With the third configuration, the opening made in the side plate of the electric dust collector can be made small, so the strength of the electric dust collector body can be maintained.

In the electrostatic precipitator of the third configuration, more preferably, the dust collecting plate is divided horizontally into four or more sections (fourth configuration).

In the fourth configuration of the electrostatic precipitator, the dust collecting plate is divided into four or more parts in the horizontal direction. By increasing the number of divisions, each of the divided first members can be made even lighter. This allows the first members to be transported in and out more efficiently.

The repair method according to this embodiment is a method for repairing an electric dust collector that includes 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 carrying-out process, a discharge electrode carrying-out process, a dust collecting plate preparation process, a discharge electrode preparation process, a dust collecting plate carrying-in process, a discharge electrode carrying-in process, a first hanging process, a first assembly process, a second hanging process, and a second assembly process. In the opening process, an opening is formed in the lower part of the side panel of the main body. In the dust collecting plate carrying-out process, the old dust collecting plate that was suspended from the first beam before repair is removed from the first beam and carried out through the opening. In the dust collecting plate carrying-out process, the old dust collecting plate is removed while the first beam is lowered, and finally the first beam is lowered to a height near the opening. In the discharge electrode carrying-out 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 carrying-out process, the old discharge electrode is removed while the second beam is lowered, and finally the second beam is lowered to a 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 new first members, which are the smallest unit 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, which are the smallest unit of division, are detachable from each other. In the dust collecting plate carrying-in process, the new first members are carried into the main body individually through the opening. In the discharge electrode carrying-in process, the new second members are carried into the main body individually through the opening. In the first hanging process, the new first member of the new dust collecting plate is hung from the first beam. In the first assembly process, the first lifting process and the first mounting process are alternately repeated. In the first lifting process, the first beam is lifted. In the first mounting process, the new first member of the new dust collecting plate is mounted below the new first member that is located at the bottom among the new first members hung from the first beam. In the second hanging process, the new second member of the new discharge electrode is hung from the second beam. In the second assembly process, the second lifting process and the second mounting process are alternately repeated. In the second lifting process, the second beam is lifted. In the second mounting process, the new second member of the new discharge electrode is mounted below the new second member that is located at the bottom among the new second members hung from the second beam (fifth configuration).

In the repair method for an electric dust collector according to the fifth configuration, the dust collecting plate is replaced by 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, the first beam is lowered while removing the multiple old dust collecting plates hung from the first beam before repair in order and removing them from the opening. In the dust collecting plate preparation step, a new dust collecting plate is prepared which is divided vertically and has new first members which are detachable from each other. In the dust collecting plate carrying step, the new first members are individually carried into the main body through the opening. In the first hanging step, the new first member of the new dust collecting plate is hung from the first beam. In the first assembly step, the first beam is raised while another new first member is attached in order below the new first member which is located at the bottom among the new first members hung from the first beam. In the dust collecting plate replacement work described above, it is not necessary to use large heavy machinery. Therefore, the dust collecting plate can be easily replaced.

In the repair method for an electric dust collector according to the fifth configuration, the discharge electrode is replaced in 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 carrying-out step, the second beam is lowered while removing the multiple old discharge electrodes hung from the second beam before repair in sequence and carrying them out through the opening. In the discharge electrode preparation step, a new discharge electrode is prepared which is divided vertically and the new second members are detachable from each other. 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 member of the new discharge electrode is hung on the second beam. In the second assembly step, the second beam is raised while another new second member is attached in sequence below the new second member located at the bottom among the new second members hung from the second beam. In the above-described discharge electrode replacement work, it is not necessary to use large heavy machinery. Therefore, the discharge electrode can be easily replaced. As described above, the repair method of the fifth configuration allows repairs to be performed easily.

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 smallest units of division, are connected to each other so as to be separable. 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 smallest units of division, are connected to each other so as to be separable. In the dust collecting plate carrying-out process, a first removal process and a first lowering process are alternately repeated. In the first removal process, the old first member located at the bottom 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 carrying-out process, a second removal process and a second lowering process are alternately repeated. In the second removal process, the old second member located at the bottom 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 (sixth configuration).

In the sixth repair method, the old dust collecting plate before repair is divided vertically, and the old first members are connected so as to be separable from each other. As a result, 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. This makes it easier to remove the old dust collecting plate.

Furthermore, in the repair method of the sixth configuration, the old discharge electrode before repair is divided vertically, and the old second members are connected so as to be separable from each other. As a result, in the discharge electrode removal process, the old discharge electrode can be disassembled into each old second member simply by removing the connections between the old second members. Therefore, the work of removing the old discharge electrode can be performed more easily.

Embodiments of the present disclosure will be described below with reference to the drawings. In each drawing, the same or equivalent components are given the same reference numerals, and the same description will not be repeated.

[Electrostatic Precipitator]
Fig. 1 is a schematic diagram of an electric dust collector 10 according to this embodiment. Fig. 1 shows the inside of the electric dust collector 10. Referring to Fig. 1, the electric dust collector 10 includes a main body 12 and an insulator chamber 11 located above a ceiling 121 of the main body 12. Within the main body 12, a plurality of dust collecting plates 20 and discharge electrodes 30 are arranged at intervals along the flow direction of the exhaust gas, which will be described later.

The electric dust collector 10 is used to collect exhaust gas discharged from equipment such as sintering machines and coke ovens. In FIG. 1, the main flow of the exhaust gas is indicated by thick arrows. The exhaust gas is introduced into the electric dust collector 10 through the inlet duct 13. The dust contained in the exhaust gas is collected by the dust collecting plate 20 inside the electric dust collector 10, and then the exhaust gas is discharged to the outside of the electric dust collector 10 through the outlet duct 14. The dust adhering to the dust collecting plate 20 is shaken off into the hopper 15 installed below the main body 12 by impacting the dust collecting plate 20 with, for example, a hammering device (not shown). The dust is discharged from the hopper 15 to the outside of the electric dust collector 10.

The insulator chamber 11 of the electric dust collector 10 houses an insulator 16. The discharge electrode 30 is supported by the insulator 16 and is insulated from the main body. In addition to the insulator 16, the insulator chamber 11 may also house a rectifier, electrical equipment, etc.

Figure 2 is a diagram showing the dust collecting plate 20 of the electric dust collector 10 according to this embodiment. Figure 3 is a side view of the dust collecting plate 20 shown in Figure 2. With reference to Figures 2 and 3, the dust collecting plate 20 is suspended from a first beam 22. The dust collecting plate 20 and the first beam 22 are connected by bolts, for example, via 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.

The dust collecting plate 20 is divided in the vertical and horizontal directions. Here, the vertical direction is the longitudinal direction of the dust collecting plate 20, and corresponds to the up-down direction when 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.

In 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 parts divided into the vertical and horizontal directions of the dust collecting plate 20 is not limited to this. The dust collecting plate 20 is preferably divided into four or more parts in the vertical direction, and more preferably into four to eight parts. The dust collecting plate 20 is also preferably divided into four or more parts in the horizontal direction, and more preferably into four to six parts.

The dust collecting plate 20 is divided into a plurality of first members 21. The first members 21 are the smallest unit of division of the dust collecting plate 20. The first members 21 may be steel sheet piles or corrugated sheets. The vertical dimension of each first member 21 is, for example, 1800 mm, and the horizontal dimension is, for example, 875 mm.

The adjacent first members 21 are connected to each other so that they can be separated from each other. There is no particular limitation on the method of connecting the first members 21 to each other. 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, if the first members 21 are connected to each other by welding, the first members 21 will bend 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 to each other by bolts via the fixing plates 23. The number of fixing plates 23 and the number of bolts connecting the two first members 21 are not particularly limited, and may be set appropriately depending on the weight of the dust collecting plate 20 and the first members 21, etc.

Figure 4 is a diagram showing the discharge electrode 30 of the electric dust collector 10 according to this embodiment. Two discharge electrodes 30 are arranged side by side in Figure 4. Figure 5 is a cross-sectional view taken along line V-V in Figure 4. Referring to Figure 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.

The discharge electrode 30 is divided in the vertical direction. Here, the vertical direction refers to the longitudinal direction of the discharge electrode 30, which corresponds to the up-down direction when the discharge electrode 30 is suspended from the second beam 32.

In this embodiment, the discharge electrode 30 is vertically divided into six parts. However, the number of vertical divisions of the discharge electrode 30 is not limited to this. The discharge electrode 30 is preferably vertically divided into four or more parts, and more preferably into four to eight parts. In this embodiment, the discharge electrode 30 is rod-shaped as a whole, so it is divided only vertically. If the discharge electrode 30 has a wide shape, it may also be divided horizontally.

The discharge electrode 30 is divided into a plurality of second members 31. The second members 31 are the smallest unit of division of the discharge electrode 30. With reference to Figs. 4 and 5, the second member 31 is made up of a main member 311 and a plurality of discharge plates 312. In this embodiment, the main member 311 is an angle bar extending in the vertical direction, and is joined to a plate-shaped discharge plate 312. The plurality of discharge plates 312 are joined to the main member 311 at intervals in the vertical direction. The vertical dimension of each second member 31 is, for example, 2000 mm.

The adjacent second members 31 are connected to each other so that they can be separated from each other. In this embodiment, the adjacent second members 31 are connected to each other so that the orientation of the main members 311 is staggered. When connecting, as described above, it is necessary to maintain a separation distance between the dust collecting plate 20 and the discharge electrode 30. Therefore, the second members 31 are preferably connected to each other with bolts via the fixing plates 33. The number of fixing plates 33 and the number of bolts connecting the two second members 31 are not particularly limited, and may be set appropriately depending on the weight of the discharge electrode 30 and the second members 31, etc.

[Repair method]
Fig. 6 is a flow diagram showing a repair method for the electric 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 collecting plate 20a and the old discharge electrode 30a before repair installed in the main body 12 of the electric dust collector 10 can be replaced with new dust collecting plate 20b and new discharge electrode 30b, respectively. Here, the old dust collecting plate 20a and the new dust collecting plate 20b have the same configuration as the above-mentioned dust collecting plate 20, and the old discharge electrode 30a and the new discharge electrode 30b have the same configuration as the above-mentioned discharge electrode 30. Each step shown in Fig. 6 will be specifically described below.

[Opening process (#5)]
In the opening step (#5), an opening 17 is formed in the lower part of the main body 12 of the electrostatic precipitator 10. Specifically, a part of the side plate 122 of the main body 12 is cut out. The state of the electrostatic precipitator 10 after the opening 17 is formed is shown in Fig. 7. Fig. 7 is a schematic diagram of the electrostatic precipitator 10 according to this embodiment. Fig. 7 shows the outside of the electrostatic precipitator 10.

The opening 17 is used as an entrance and exit for each member (first member 21 and second member 31) in the unloading process (#10) and loading process (#20) described below. The opening 17 may be large enough to allow each member to pass through, for example, 1800 mm vertically and 1200 mm horizontally. After repair work on the electric dust collector 10 is completed, a plate the same size as the opening 17 may be welded to the side plate 122 of the main body 12 to repair it.

[Export process (#10)]
The carrying out step (#10) includes a dust collecting plate carrying out step (#10a) and a discharge electrode carrying out step (#10b). In the dust collecting plate carrying out step (#10a), the old dust collecting plate 20a is removed while the first beam 22 is lowered, and the old dust collecting plates 20a suspended from the first beam 22 are removed one by one from the first beam 22. Specifically, a first removing step of removing the lowest old first member 21a among the old first members 21a of the old dust collecting plate 20a and a first lowering step 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 plate 20a is carried out from the opening 17.

In the discharge electrode removal process (#10b), the old discharge electrode 30a is removed while the second beam 32 is lowered, and the multiple old discharge electrodes 30a suspended from the second beam 32 are removed one by one from the second beam 32. Specifically, a second removal process for removing the lowest old second member 31a among the old second members 31a of the old discharge electrode 30a and a second lowering process for lowering the second beam 32 are alternately repeated. Finally, the second beam 32 is lowered to a height near the opening 17. Thereafter, the removed old discharge electrode 30a is carried out from the opening 17.

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. The first beam 22 is then released from its fastening and lowered. Also, the chain of the chain block installed on the frame of the ceiling 121 is attached to the second beam 32. The second beam 32 is then released from its fastening and lowered.

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 to 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 do not have to be divided. In that case, in the dust collecting plate carrying out process (#10a), the first beam 22 is lowered while the old dust collecting plate 20a is cut to vertically divide the old dust collecting plate 20a. In addition, in the discharge electrode carrying out process (#10b), the second beam 32 is lowered while the old discharge electrode 30a is cut to vertically divide the old dust collecting plate 20a. The cutting method is, for example, gas cutting.

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

[Loading process (#20)]
The carrying-in process (#20) includes a dust collecting plate carrying process (#20a), a discharge electrode carrying process (#20b), a first hanging process (#25a), a first assembling process (#30a), a second hanging process (#25b), and a second assembling process (#30b).

In the dust collecting plate carrying-in process (#20a), the new dust collecting plate 20b prepared in the dust collecting plate preparation process (#15a) is carried into the main body 12. In the dust collecting plate carrying-in process (#20a), each of the new first members 21b is carried in a state in which the new first members 21b are individually separated, through the openings 17 formed in the opening process (#5).

In the discharge electrode carrying process (#20b), the new discharge electrode 30b prepared in the discharge electrode preparation process (#15b) is carried into the main body 12. In the discharge electrode carrying process (#20b), each of the new second members 31b is carried in a state in which the new second members 31b are individually separated through the openings 17 formed in the opening process (#5).

In the first hanging process (#25a), the new first member 21b brought in in the dust collection plate bringing-in process (#20a) is hung from the first beam 22. In the first assembly process (#30a), the first beam 22 is raised while multiple new dust collection plates 20b are attached to the first beam 22 in sequence. Specifically, a first attachment process in which a new first member 21b is attached below the lowest new first member 21b among the new first members 21b hung from the first beam 22, and a first raising process in which the first beam 22 is raised are alternately repeated. Finally, the first beam 22 is raised to the same height as before the repair, and the first beam 22 is fixed to the fixture.

In the second hanging process (#25b), the new second member 31b brought in in the discharge electrode bringing-in process (#20b) is hung from the second beam 32. In the second assembly process (#30b), the second beam 32 is raised while the multiple new discharge electrodes 30b are attached to the second beam 32 in sequence. Specifically, a second attachment process in which the new second member 31b is attached below the lowest new second member 31b among the new second members 31b hung from the second beam 32, and a second raising process in which the second beam 32 is raised are alternately repeated. Finally, the second beam 32 is raised to the same height as before the repair, and the second beam 32 is fixed to the fixture.

Although an example of a method for repairing the electric dust collector 10 has been described above, the order in which each step is performed is not limited to this. For example, after the dust collecting plate removal step (#10a), the dust collecting plate preparation step (#15a), the dust collecting plate insertion step (#20a), the first hanging step (#25a), and the first assembly step (#30a), the discharge electrode removal step (#10b), the discharge electrode preparation step (#15b), the discharge electrode insertion step (#20b), the second hanging step (#25b), and the second assembly step (#30b) may be performed. In short, the dust collecting plate 20 and the discharge electrode 30 do not necessarily need to be replaced at the same time, and one may be replaced first before the other.

In addition, in the above-mentioned method for repairing the electric dust collector 10, all of the divided dust collecting plates 20 (each first member 21) and the discharge electrode 30 (each second member 31) are replaced. However, if only some of the first members 21 are deteriorated in one dust collecting plate 20, only the deteriorated first members 21 may be replaced. Similarly, in the discharge electrode 30, if only some of the second members 31 are deteriorated, only the second members 31 may be replaced.

[effect]
In the repair method for the electric dust collector 10 according to the present embodiment, the dust collecting plate 20 is replaced in the following procedure. In the opening step (#5), an opening 17 is formed in the lower part of the side plate 122 of the main body 12. In the dust collecting plate carrying-out step (#10a), the first beam 22 is lowered while the multiple old dust collecting plates 20a suspended from the first beam 22 before repair are sequentially removed and carried out through the opening 17. In the dust collecting plate preparation step (#15a), a new dust collecting plate 20b is prepared which is vertically divided and has new first members 21b which are detachable from each other. In the dust collecting plate carrying-in step (#20a), the new first members 21b are individually carried into the main body 12 through the opening 17. In the first hanging step (#25a), the new first members 21b of the new dust collecting plate 20b are hung from the first beam 22. In the first assembly step (#30a), the first beam 22 is raised and another new first member 21b is sequentially attached below the lowest new first member 21b among the new first members 21b suspended from the first beam 22. In the above-described replacement work of the dust collecting plate 20, it is not necessary to use large heavy machinery. Therefore, the replacement of the dust collecting plate 20 can be easily performed.

In the repair method of the electric dust collector 10 according to this embodiment, the replacement of the discharge electrode 30 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 discharge electrode carrying-out process (#10b), the second beam 32 is lowered while removing the multiple old discharge electrodes 30a suspended from the second beam 32 before repair one by one, and carrying them out through the opening 17. In the discharge electrode preparation process (#15b), a new discharge electrode 30b is prepared which is vertically divided and has new second members 31b which are detachable from each other. In the discharge electrode carrying-in process (#20b), the new second members 31b are individually carried into the main body 12 through the opening 17. In the second hanging process (#25b), the new second members 31b of the new discharge electrode 30b are hung from the second beam 32. In the second assembly process (#30b), the second beam 32 is raised and another new second member 31b is sequentially attached below the lowest new second member 31b among the new second members 31b suspended from the second beam 32. In the replacement work of the discharge electrode 30 described above, it is not necessary to use large heavy machinery. Therefore, the replacement of the discharge electrode 30 can be easily performed. As described above, according to the repair method of the electric dust collector 10 of this embodiment, repair can be easily performed.

In the repair method for the electric dust collector 10 according to this embodiment, the old dust collecting plate 20a before repair and the new dust collecting plate 20b after repair are divided vertically and horizontally, respectively. In addition, the old discharge electrode 30a before repair and the new discharge electrode 30b after repair are each divided vertically. Since each divided member is lighter and smaller than the undivided dust collecting plate 20 and discharge electrode 30, the work of carrying out and carrying out each member can be performed efficiently. In addition, in the opening process (#5), the opening 17 is formed to a size large enough for each member to pass through. Therefore, the opening 17 formed in the repair work can be small, and the strength of the body 12 of the electric dust collector 10 can be maintained.

The above describes the embodiments of the present disclosure. 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 can be implemented by modifying the above-described embodiments as appropriate within the scope of the spirit of the present disclosure.

In the above embodiment, the dust collecting plate 20 is divided both vertically and horizontally. However, the dust collecting plate 20 may be divided only vertically. Even in this case, when replacing the dust collecting plate 20, the first beam 22 can be lowered and the multiple first members 21 can be separated one by one to remove the dust collecting plate 20.

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 (5)

A dust collecting plate divided in a vertical direction, wherein first members, which are the smallest units of division, are connected to each other so as to be separable from each other;
the discharge electrode being divided in the vertical direction, and second members which are minimum units of division are connected to each other so as to be separable from each other;
A first beam for suspending the dust collecting plate;
a second beam for suspending the discharge electrode;
a main body that accommodates the dust collecting plate, the discharge electrode, the first beam, and the second beam ;
The dust collecting plate is further divided in a horizontal direction perpendicular to the vertical direction. 2. The electrostatic precipitator according to claim 1,
The dust collecting plate is divided into four or more sections in the vertical direction,
An electric dust collector, wherein the discharge electrode is divided into four or more portions in the vertical direction. 2. The electrostatic precipitator according to claim 1 ,
An electric dust collector, wherein the dust collecting plate is divided into four or more parts in the lateral direction. A repair method for an electric dust collector including 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, comprising:
an opening step of forming an opening in a lower portion of a side panel of the main body;
a dust collecting plate carrying-out process for removing an old dust collecting plate suspended from the first beam before repair from the first beam and carrying it out from the opening, the dust collecting plate being removed while lowering the first beam, and finally, the first beam being lowered to a height near the opening;
a discharge electrode carrying-out process for removing an old discharge electrode suspended from the second beam before repair from the second beam and carrying it out from the opening, in which the old discharge electrode is removed while lowering the second beam, and finally the second beam is lowered to a height near the opening;
a dust collecting plate preparation step of preparing a new dust collecting plate divided in a vertical direction, the new dust collecting plate being detachable from the new first members which are the minimum division units;
a discharge electrode preparation step of preparing a new discharge electrode divided in the vertical direction, the new discharge electrode having a new second member, which is a minimum unit of division, that is detachable from the other new discharge electrode;
a dust collecting plate carrying step of carrying the new first members into the main body individually through the opening;
a discharge electrode carrying step of carrying the new second members into the main body individually through the opening;
a first hanging step of hanging the new first member of the new dust collecting plate from the first beam;
a first assembly process in which a first raising process and a first mounting process are alternately repeated, in which the first raising process raises the first beam, and in the first mounting process, a new first member of the new dust collecting plate is mounted below the new first member that is located at the bottom among the new first members suspended from the first beam;
a second hanging step of hanging the new second member of the new discharge electrode on the second beam;
a second assembly step in which a second raising step and a second installation step are alternately repeated, in which in the second raising step, the second beam is raised, and in the second installation step, the new second member of the new discharge electrode is installed below the new second member that is located lowest among the new second members suspended from the second beam. A method for repairing an electric dust collector according to claim 4 , comprising the steps of:
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 smallest units of division, are connected to each other so as to be separable from 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 smallest units of division, are connected to each other so as to be separable from each other,
In the dust collecting plate carrying-out step, a first removing step of removing the lowest old first member 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 carrying-out step, a second removing step of removing the lowest old second member of the old discharge electrode suspended from the second beam and a second lowering step of lowering the second beam are alternately repeated.