JP2013022487A - Method for mending electrode plate of electric dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for mending the electrode plate of an electric dust collector, which properly copes with partial deterioration and damage of an element in the electrode plate, and suppresses rise of a construction cost in its replacement work.SOLUTION: An engineering method for mending the electrode plate of the electric dust collector includes: a process for providing an opening at the ceiling surface of a casing in the electric dust collector; a process for detaching only an element to be replaced from the electrode plate, with a part of elements constituting the electrode plate as the element to be replaced, and carrying the detached element out of the opening; and a process for assembling new elements of the same number as the elements to be replaced to the electrode plate after being carried in from the opening.

Description

  The present invention relates to a method for repairing an electrode plate such as a dust collecting electrode and a discharge electrode of an electric dust collecting device, and particularly suitable for performing partial renewal of a dust collecting electrode in an electric dust collecting device. The present invention relates to an electrode plate repair method for the apparatus.

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

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

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

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

The above-described conventional electrode plate installation / updating methods of the electrostatic precipitator are methods for updating the entire electrode plate. However, for example, in a dust collecting electrode configured by arranging a plurality of elements in parallel, the element arranged on the end side of the dust collecting electrode is more than the element arranged in the center of the dust collecting electrode. High rate of deterioration and damage. This is because when the dust attached to the dust collecting electrode is wiped off, the impact of hitting the hitting portion provided on the side end of the dust collecting electrode with a hammer is easily transmitted to the element located on the end side. It depends on the circumstances.
Conventionally, even when a part of the elements constituting the electrode plate is deteriorated or damaged, the entire electrode plate is replaced, resulting in an increase in the construction cost.

  An object of the present invention is to provide an electrode plate repair method for an electrostatic precipitator that can appropriately cope with partial deterioration and damage of an element in an electrode plate and suppress an increase in construction cost in replacement work.

  In order to achieve the above object, the electrode plate repair method for an electrostatic precipitator according to the present invention includes a step of providing an opening in the ceiling surface of the casing in the electrostatic precipitator and a part of the elements constituting the electrode plate being replaced. As a target, removing only the element to be exchanged from the electrode plate and carrying it out from the opening, carrying in the same number of new elements as the element to be exchanged from the opening and assembling the electrode plate, It is characterized by having.

  Further, in the electrode plate repair method for an electrostatic precipitator having the above-described features, a box that allows a plurality of new elements to be stacked and accommodated in the surface direction is used to carry in the new elements. It is good to make it.

  By adopting such a method, the element is not damaged when the new element is lifted, or the long and thin element is prevented from being distorted. In addition, it is possible to efficiently carry out and carry out the elements.

Moreover, in the electrode plate repair method of the electrostatic precipitator which has the above characteristics, it is good for the said opening part to have an opening width which can penetrate the said box.
By adopting such a method, it is not necessary to provide a large opening.

  Further, in the electrode plate repair method for an electrostatic precipitator having the above-described characteristics, the opening may be provided at a position avoiding various devices provided at the upper part of the casing.

  By adopting such a method, it is not necessary to move various devices and equipment provided in the upper part of the casing, and it is possible to suppress the construction period and cost required for the conventional movement.

  Also, in the electrode plate repair method for an electrostatic precipitator having the above-described features, an array beam is provided in the casing in parallel with the array direction of the elements constituting the electrode plate, and the new article is carried into the casing. The elements may be temporarily suspended on the array beam and assembled after the replacement target element is moved to the removed position.

  By adopting such a method, there is no need to provide the opening directly above the position where the element to be replaced is removed. For this reason, the freedom degree of the formation position of an opening part increases.

Further, in the electrode plate repair method for an electrostatic precipitator having the above-described features, the electrode plate having the replacement target element may be moved in accordance with the opening position of the opening.
Employing such a method also reduces the restriction on the position where the opening is formed. Therefore, the degree of freedom of the position where the opening is formed is increased.

Furthermore, in the electrode plate repairing method for an electrostatic precipitator having the above-described characteristics, the electrode plate may be moved after the other electrode plates are brought closer together and temporarily suspended.
By adopting such a method, it is possible to ensure a space for moving the electrode plate by effectively using a limited space in the casing.

  According to the electrode plate repair method for an electrostatic precipitator having the above-described features, it is possible to appropriately cope with partial deterioration and damage of elements in the electrode plate, and to suppress an increase in construction costs in replacement work. .

It is a perspective view of the electric dust collector of the state which is performing the electrode carrying in / out operation | work which concerns on embodiment. It is a block diagram of the electrostatic precipitator which shows the cross-sectional structure of the direction orthogonal to the arrangement direction of an electrode plate. It is a block diagram of the electrostatic precipitator which shows the cross-sectional structure of the direction parallel to the arrangement direction of an electrode plate. It is a partial permeation | transmission perspective view which shows the structure of a dust collection electrode. It is a partial permeation | transmission perspective view which shows the mode of the repair work of an electrode plate. It is a figure which shows the structure of the box used for lifting of an element. It is a figure which shows the structure of the hanging jig used for the movement of the element in a casing. It is a figure for demonstrating how to assemble a new element. It is a block diagram which shows the state which put the electrode plate in the casing, and moved the electrode plate made into the work object to the opening part vicinity. It is a figure which shows the structure of a U volt | bolt and a J volt | bolt.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment according to an electrode plate repair method for an electric dust collector of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 3, the electrostatic precipitator for carrying out the electrode plate repair method for the electrostatic precipitator according to the present embodiment includes a casing 12, a dust collecting electrode 26 suspended in the casing 12, and The discharge electrode 34 is basically used. The casing 12 is provided with an exhaust gas inlet 12a on one side and a processing gas outlet 12b on the opposite side. In addition, a hopper 12c is provided at the lower portion so that dust removed from the exhaust gas can be collected. Inside the casing 12, an erection beam 16, a hoist 18, an electrode suspension beam 14, and the like are provided.

  The electric dust collector shown in FIG. 1 to FIG. 3 is an example of a form including a large dust collecting electrode 26 and a discharge electrode 34. FIG. 1 is an external perspective view of the electrostatic precipitator when performing the electrode replacement method according to the embodiment. FIG. 2 is a block diagram showing a cross-sectional configuration in which the electric dust collector is cut in a direction crossing the arrangement direction of the dust collection electrode and the discharge electrode. FIG. 3 is a block diagram showing a cross-sectional configuration of the electric dust collector cut in parallel with the direction of arrangement of the dust collection electrode and discharge electrode.

  The erection beam 16 is a beam for traversing the hoist 18 and is stretched in a direction orthogonal to the flow direction of the exhaust gas. The hoist 18 suspends the electrode plate such as the dust collecting electrode 26 and the discharge electrode 34 carried into the casing 12 and hangs it on the electrode suspending beam 14 or lowers the electrode plate suspended on the electrode suspending beam 14. It is an overhead crane.

  The electrode suspension beam 14 is a beam for suspending the dust collection electrode 26 described above. The electrode suspension beam 14 is stretched over both sides of the erection beam 16 in a direction parallel to the erection beam 16, that is, in a direction orthogonal to the flow direction of the exhaust gas. In addition, the electrode suspension beam 14 is set to have a higher cross-sectional height and higher load resistance than the erection beam 16. The suspended height of the dust collection electrode 26 by the electrode suspended beam 14 is set to be lower than the traversing height of the hoist 18 in the erection beam 16. By setting it as such a structure, the plate | board surface of the dust collection electrode 26 suspended by the electrode suspension beam 14 becomes parallel to the distribution direction of waste gas, and the waste gas processing efficiency is improved. Further, the hoist 18 traversing the erection beam 16 can freely traverse in a state where the dust collection electrode 26 is suspended from the electrode suspension beam 14. Therefore, the dust collection electrode 26 at an arbitrary position can be resuspended.

  In the electrostatic precipitator 10 having such a basic configuration, a high voltage is applied to the discharge electrode 34, and an electric field is formed between the discharge electrode 26. Then, the exhaust gas around the discharge electrode 34 is ionized to supply ions. Thereby, when the exhaust gas containing dust particles is introduced from the exhaust gas inlet 12a, the dust particles can be charged with ions and collected by the Coulomb force on the dust collecting electrode. Then, the exhaust gas from which the dust particles have been removed is discharged from the processing gas discharge port 12b as a processing gas. The dust collecting electrode 26 is periodically hammered by a frame (follow-up portion) constituting the dust collecting electrode 26 so that the collected dust is removed and accumulated in the hopper 12c. The ability can be restored.

  As shown in FIG. 4, the dust collection electrode 26 shown in the present embodiment is configured based on a plurality of elements 28, an upper member 30, and a lower member 32. The element 28 is a strip-shaped steel plate that is pressed into an uneven shape. The upper member 30 and the lower member 32 are members for sandwiching the upper end portion and the lower end portion of a plurality of elements 28, respectively. When the dust collecting electrode 26 is configured using such a member, a plurality of elements 28 are arranged in parallel, and then the plurality of elements 28 arranged by the upper member 30 and the lower member 32 are sandwiched. Thereafter, the element 28 and the upper member 30 and the element 28 and the lower member 32 are respectively fixed by the fixing bolt 33 via the upper member 30 and the lower member 32.

  When the electrode plate repairing method according to the present embodiment is performed on the electrostatic precipitator 10 having such a basic configuration, the array beam 20 is provided between the paired electrode suspension beams 14. The array beam 20 is a beam stretched between temporary rails 22 provided on the electrode suspension beam 14, and is provided in parallel with the dust collection electrode 26. Since the array beam 20 forms its body simply by being placed on the temporary rail 22, it can be moved to a position where the dust collection electrode 26 to be repaired is present, if necessary. For this reason, if it is not a position which overlaps with the hoist 18 provided in the erection beam 16, the arrangement position can be freely changed (see FIG. 5). The array beam 20 is provided with a hoist 24, which enables an element to be replaced (exchange target element 28) or a new element 28 to be moved in parallel with the dust collection electrode 26.

  Moreover, when implementing the electrode plate repair method which concerns on this embodiment, as shown in FIG.1 and FIG.5, the opening part 12d is formed in the ceiling surface of the casing 12. FIG. This is because the exchangeable element 28 is carried out and the new element 28 is carried in through the opening 12d. The opening 12d is desirably provided at a position avoiding various devices arranged on the ceiling surface. This is to save time and labor for moving the equipment existing at the position of the opening 12d and shorten the construction period. Moreover, the opening part 12d should just have a magnitude | size more than the width | variety of the box 50 which mentions details later, and the dimension of the thickness direction. This is because, if the opening size is the minimum necessary, there is little overlap with the placement device, and it is possible to increase the variation of locations where the opening 12d is formed.

  A box 50 as shown in FIG. 6 is used to carry out and carry in (loading in exclusively) the element 28. This is to prevent the element 28 from being damaged by hanging the element 28 barely. A box 50 of the type shown in FIG. 6 includes a frame 52, a rear lattice 54, and a front hooking portion 56. The frame 52 has substantially the same width and length as the element 28, and has a thickness that allows several elements 28 to be stacked and accommodated in the plane direction. The frame 52 is provided with a suspension ring 58, and can be lifted through the suspension ring 58 so as to be in a state perpendicular to the longitudinal direction. The rear lattice 54 is a member that seals one opening surface of the frame body 52 in a lattice shape, and plays a role of preventing the element 28 accommodated in the frame body 52 from falling. The front hooking portion 56 is a rod-like or strip-like member stretched in the short side direction of the frame body 52 on the other opening surface of the frame body 52, and the element 28 accommodated in the frame body 52 is disposed on the front surface. It plays the role of preventing the camera from tilting to the side and falling. The front surface latching portion 56 is configured to be able to flip up the other side edge portion with the one edge side edge portion of the frame body 52 as a base point. For this reason, the element 28 is accommodated in the frame 52 in a state where the front hooking portion 56 is flipped up, and can be prevented from being tilted or dropped when the front hooking portion 56 is lowered.

  In the electrode plate repair method for an electrostatic precipitator according to the present invention, the procedure for carrying out the replacement target element 28 and the carrying-in operation of the new element 28 are reversed. For this reason, in the following description, in order to simplify the description, only the operation of carrying in the new element 28 that requires more careful work will be described.

  First, an opening 12 d for carrying the new element 28 is formed on the ceiling surface of the casing 12. The new element 28 is accommodated in the box 50 simultaneously with the formation of the opening 12d or before and after the formation of the opening 12d. The accommodation number of the new elements 28 may be the same as the number of elements carried out from the casing 12 as the replacement target elements 28.

  Next, the box 50 containing the new element 28 is lifted by a crane. The box body 50 is lifted such that the longitudinal direction is in a state along the vertical direction. This is because, by lifting the box 50 in such a state, it is possible to carry in from the opening 12d having a small opening width. Thereafter, the hung box 50 is moved and unrolled to be carried into the casing 12 of the electrostatic precipitator 10.

  After carrying the box body 50 into the casing 12, the front hooking portion 56 of the box body 50 is flipped up, and the new elements 28 housed in the box body 50 one by one on the hoist 24 provided on the array beam 20. Change it. A hanging jig 60 as shown in FIG. 7 is provided on the hook portion of the hoist 24. The hanging jig 60 is a hook provided with a relief with respect to the upper end portion of the element 28. From such a configuration, the fixed end 62 is fixed to the hook portion of the hoist 24, and the tip end portion 64 is hooked on the temporary suspension hole 28b provided on the upper end side of the element 28, so that the upper member 30 is avoided. The element 28 can be lifted.

  The new element 28 suspended from the hoist 24 of the array beam 20 is translated to the position where the element 28 to be replaced is removed from the dust collecting electrode 26 and assembled to the dust collecting electrode (see FIG. 8A). ). In assembling the new element 28, first, the lower end portion of the new element 28 is inserted into the lower member 32 as shown in FIG. Since the new element 28, which is a long object, has a slight deflection, as shown in FIG. 8 (C), the lower end portion of the new element 28 is inserted below the specified fixed position in the lower member 32. The upper end portion of the new element 28 can be inserted into the upper member 30. Therefore, after the lower end portion of the new element 28 is inserted into the lower member 32, the upper end portion of the new element 28 is slid toward the lower side of the upper member 30 as shown in FIG. By pulling it up, the new element 28 can be placed in a fixed position.

  The new element 28 arranged at the fixed position is temporarily assembled by inserting the fixing bolt 33 through the fixing hole 28a through the upper member 30 and the lower member 32. Thereafter, temporary assembly of the new elements 28 is sequentially performed, and after the temporary assembly of all the new elements 28 constituting the dust collection electrode 26 is completed, the fixing bolts 33 are finally tightened and fixed.

  According to such a construction method, it is possible to replace only a part of the elements 28 that are deteriorated or damaged among the elements 28 that constitute the dust collecting electrode 26 (electrode plate). For this reason, compared with the conventional construction method which replaces the dust collection electrode 26 itself, it becomes possible to reduce a construction cost (repair cost) significantly.

  Further, by providing the opening 12d provided in the upper portion of the casing 12 while avoiding the arrangement of various devices, it is not necessary to move the device provided in the upper portion of the casing 12. Therefore, the construction period and cost required for moving the equipment can be suppressed.

  Further, by setting the opening area of the opening 12d provided on the ceiling surface to be about the width of the box 50 that accommodates the element 28, the opening area of the opening 12d can be made the minimum necessary size. Thereby, the freedom degree of the position which provides the opening part 12d improves, and it becomes possible to provide the opening part 12d for every row | line | column.

  Here, when the position where the opening 12d is formed cannot be in the vicinity of the dust collection electrode 26 to be repaired due to the equipment arranged on the upper portion of the casing 12, the repair work is performed as follows. It is desirable to do. That is, the dust collecting electrode 26 having the element 28 to be replaced or the dust collecting electrode 26 to which the new element 28 is assembled is moved in the casing 12 in accordance with the opening position of the opening 12d, and then repair work is performed. .

  Specifically, as shown in FIG. 9, the electrode plate such as the dust collection electrode 26 and the discharge electrode 34 is temporarily reduced to secure a moving space for the dust collection electrode 26 to be worked. It is. Then, using the secured moving space, the dust collecting electrode 26 to be worked is moved to the vicinity of the opening 12d to perform repair work. In addition, the width adjustment of the dust collection electrode 26 and the discharge electrode 34 may be performed as follows.

  When the dust collecting electrode 26 is installed at a regular hanging position, a U bolt 40 as shown in FIG. 10A is used. Since both ends of the U-bolt 40 having a U-shape are male threaded portions, one U-bolt 40 is fixed using two fixing holes, and the installation state is stabilized. Can be achieved.

  On the other hand, in the case of the width alignment arrangement, the dust collecting electrode 26 is temporarily suspended by a hook-shaped J bolt 42 as shown in FIG. One J bolt 42 can be attached to one fixing hole, and as shown in FIG. 10B, one U bolt 40 is fixed by attaching the hook portions 42a so as to face each other. It is possible to attach two J bolts 42 to the space to be used. For this reason, by temporarily suspending the dust collecting electrode 26 to each J bolt 42, it becomes possible to temporarily suspend the two dust collecting electrodes 26 in the space where the one dust collecting electrode 26 is suspended. It is possible to secure a space for moving the dust collection electrode 26 in the casing 12.

  In addition, the hoist 18 provided in the erection beam 16 may be used for the movement of the dust collection electrode 26. That is, the work of temporarily suspending the dust collecting electrode 26 on the hook portion of the hoist 18, replacing the U bolt 40 with the J bolt 42, and rehanging the hoist 18 from the J bolt 42 is repeated.

  Here, when the dust collection electrode 26 is narrowed, the discharge electrode 34 is preferably attached to the dust collection electrode 26. This is because it is easy to secure the space. In addition, the discharge electrode 34 may be tied to the dust collecting electrode 26 with a number line or the like.

  By adopting such a construction method, it is possible to carry out the electrode plate repairing method for the electrostatic precipitator according to the present invention, even when the openable portions of the opening are limited.

DESCRIPTION OF SYMBOLS 10 ......... Electric dust collector, 12 ......... Casing, 12a ......... Exhaust gas inlet, 12b ......... Processing gas discharge port, 12c ......... Hopper, 12d ......... Opening part, 14 ......... Electrode Hanging beam, 16 ......... Erection beam, 18 ......... Hoist, 20 ......... Array beam, 24 ......... Hoist, 26 ......... Dust collector, 28 ......... Element (new element, element to be replaced) 30 ......... Upper member, 32 ......... Lower member, 34 ......... Discharge electrode, 50 ......... Box, 52 ......... Frame, 54 ......... Rear grid, 56 ......... Front latch Department.

Claims (7)

Providing an opening in the ceiling surface of the casing in the electric dust collector;
A part of the elements constituting the electrode plate is to be replaced, and only the element to be replaced is removed from the electrode plate and carried out from the opening.
A method of repairing an electrode plate of an electrostatic precipitator, comprising the step of carrying in as many new elements as the replacement target elements from the opening and assembling the same to the electrode plate.   The method of repairing an electrode plate of an electrostatic precipitator according to claim 1, wherein a box that allows a plurality of new elements to be stacked and accommodated in a plane direction is used for carrying in the new elements. .   The said opening part shall have the opening width which can penetrate the said box, The electrode plate repair method of the electrostatic precipitator of Claim 2 characterized by the above-mentioned.   The said opening part was provided in the position which avoided the various apparatus provided in the upper part of the said casing, The electrode plate repair method of the electrostatic precipitator of Claim 3 characterized by the above-mentioned. In the casing, an array beam is provided in parallel with the array direction of the elements constituting the electrode plate,
The new element carried into the casing is temporarily suspended by the array beam, and is assembled after the replacement target element is moved to the removed position. The electrode plate repair method of the electrostatic precipitator according to item 1.   The electrode plate repair method for an electrostatic precipitator according to any one of claims 1 to 5, wherein the electrode plate having the element to be replaced is moved in accordance with the opening position of the opening.   The method of repairing an electrode plate for an electrostatic precipitator according to claim 6, wherein the movement of the electrode plate is performed after the other electrode plates have been brought close to each other and temporarily suspended.

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