JP4036201B2 - Discharge frame support for electrostatic precipitator - Google Patents

Description

  The present invention relates to a discharge frame support of an electrostatic precipitator, and more particularly to a discharge frame support suitable for a discharge frame of a wet type electrostatic precipitator that uses mist for cleaning.

  In an exhaust gas treatment system for a boiler that uses coal, heavy oil, or the like as fuel, an electrostatic precipitator is disposed downstream of a desulfurizer or the like in order to prevent purple smoke from flowing out.

  The electrostatic precipitator has a configuration in which a plurality of flat dust collecting electrodes and a plurality of discharge electrodes are arranged alternately. In such an electrostatic precipitator, a processing gas such as purple smoke is allowed to flow between the dust collecting electrode and the discharge electrode, and a negative voltage is applied to the discharge electrode to generate a corona discharge toward the dust collecting electrode. Thereby, the dust etc. in process gas are collected by the dust collection electrode. A discharge electrode of an electrostatic precipitator having such a configuration is described in Patent Document 1.

Moreover, there exists what is called a wet type electrostatic precipitator in an electrostatic precipitator. This is to wash away the dust collected by the dust collecting electrode by the operation of the electric dust collector using the mist of the cleaning liquid.
In the electric dust collector having the above configuration, the dust collecting frame having the dust collecting electrode is generally suspended freely, whereas the discharge frame having the discharge electrode has a discharge frame support 1 as shown in FIG. Is fixed to the discharge frame fixing beam 2 at a plurality of locations.

  Examples of the conventional discharge frame support include those shown in FIGS. Of the discharge frame supports shown in FIG. 8, the discharge frame support provided at the uppermost stage indicated by a broken line plays a role of supporting the self-weight of the discharge frame, and the discharge frames shown in FIG. 9 and FIG. The structure is different from that of the support 1.

9A shows a plan view, and FIG. 9B shows a front view. The discharge frame support 1a sandwiches the discharge frame 3 between two face plates 4a and 4b, and the end of one face plate 4a. Is inserted into a groove 5a provided at one end of the pipe member 5 and welded, and the other end of the pipe member 5 is provided with a groove 5b in a direction perpendicular to the groove 5a provided at the one end. Is inserted and welded to fix the face plate 6 to the discharge frame fixing beam 2.
10A shows a plan view, and FIG. 10B shows a front view. The discharge frame support 1b welds one flat portion 7a of the face plate 7 formed in an L shape to the discharge frame 3. The other flat portion 7 b is fixed to the discharge frame fixing beam 2.
JP-A-10-113575

  The discharge frame support 1 (1a, 1b) shown in FIG. 9 and FIG. 10 is firmly fixed against vertical shaking of the discharge frame, and stress is applied to a specific portion. There is little to concentrate. This is considered to be due to the fact that the discharge frame supports are provided at a plurality of locations of the discharge frames arranged vertically, so that the stress caused by the shaking can be dispersed. However, with respect to the shaking of the discharge frame in the horizontal direction (rolling), local stress concentration can be seen at the maximum stress generation location shown in each figure. For this reason, the discharge frame support may cause fatigue failure from a location where stress is concentrated. Further, in the wet type electrostatic precipitator, when the discharge frame support shown in FIG. 10 is used, the mist of the cleaning liquid accumulates in a liquid state on the plate surface constituting the discharge frame support, and the corrosion of the member proceeds from there. In some cases, fatigue failure is promoted.

  In the present invention, a discharge frame support that supports a discharge frame of an electrostatic precipitator, and no stress is concentrated on a specific location no matter what kind of shaking occurs in the discharge frame. An object of the present invention is to provide a discharge frame support for an electrostatic precipitator that can disperse stress as described above and has high durability.

The discharge frame support of the electrostatic precipitator according to the present invention for solving the above problems is a discharge frame support for fixing the discharge frame of the electrostatic precipitator to the discharge frame fixing beam, and is disposed vertically. A sandwiching portion for sandwiching and supporting the discharge frame; and a leg portion fixed to the discharge frame fixing beam, wherein the leg portion is formed as an open leg, and the sandwiching portion and the leg portion are formed by a pair of plate members. The plate member is configured such that when the plate surface is disposed vertically and the plate surface is fixed to the discharge frame fixing beam disposed horizontally, the bottom surface and the side surface are formed at right angles. Each of the surface and the fixing surface of the discharge frame fixing beam is configured to include a fixing member for fixing the surface and the fixing surface to each other by surface bonding .

  Of course, the fixing member may be integrally formed as a fixing portion with the discharge frame support having the above-described configuration. Thereby, it becomes possible to produce the structural member of the discharge frame support by punching with a press or the like, and the number of members can be reduced.

  In the discharge frame support of the electrostatic precipitator as described above, it has a sandwiching part and a leg part, and the leg part is formed as an open leg, so that there are two places to be fixed to the discharge frame fixing beam. Therefore, it is possible to reduce the rolling of the discharge frame that the conventional discharge frame support is not good at. Therefore, it can avoid that the stress to a specific location concentrates.

  Further, by configuring the sandwiching portion and the leg portion with a pair of plate members, the configuration becomes simple, and it is not necessary to provide a welded portion with a small amount of elastic deformation in the discharge frame support body. Therefore, since stress concentration that often occurs in the welded portion can be avoided, fatigue failure is unlikely to occur.

  By adopting a configuration in which the plate surface of the plate member is arranged along the vertical direction, durability against shaking of the discharge frame in the vertical direction is improved. In addition, since the projected area in the vertical direction is reduced, the phenomenon of cleaning liquid mist that accumulates in the discharge frame support body during cleaning of the wet electrostatic precipitator can be reduced, and the promotion of fatigue failure due to corrosion is suppressed. can do.

  Further, when the discharge frame support having the above configuration is fixed to the discharge frame fixing beam, the bottom surface and the side surface are formed at right angles, and the plate surface of the plate member and the fixing surface of the discharge frame fixing beam are fixed to each other by surface bonding. By interposing a fixing member for this purpose, it is possible to firmly fix the plate member having a vertical surface and the discharge frame fixing beam having a horizontal surface by surface bonding. Therefore, the effect of suppressing the rolling of the discharge frame support can be obtained.

  Hereinafter, an embodiment according to a discharge frame support of an electric dust collector of the present invention will be described with reference to the drawings. In addition, the form shown below is a part of embodiment which concerns on this invention, Comprising: The discharge frame support of the electrostatic precipitator of this invention has various forms in the range which does not deviate from the structure which concerns on the principal part. Shall be included.

  FIG. 1 is a perspective view showing a first embodiment of the discharge frame support of the electric dust collector of the present invention, FIG. 2 (A) is a plan view thereof, and FIG. 2 (B) is a right side view thereof. FIG. 2C is a front view of the same.

The configuration of the discharge frame support 10 of the present embodiment includes a sandwiching portion 12 that sandwiches a discharge frame 50 arranged vertically, and a discharge frame fixing beam 60 that secures the discharge frame from the sandwiching portion 12. The leg part 14 formed with the legs open toward the main part is configured as a main part.
In this embodiment, the said clamping part 12 and the leg part 14 are comprised from one board member, and comprise the shape as the discharge frame support 10 by using a pair of said board member.

The discharge frame support 10 forms an open leg of the sandwiching portion 12 and the leg portion 14 by bending one plate member.
In FIG. 2, the leg portion 14 is shown as being formed with an open leg by bending both sides. However, the leg portion 14 is formed by bending one of a pair of plate members. It goes without saying that the leg portion 14 is formed by opening the leg.

  The sandwiching portion 12 is formed by forming an arc-shaped arm bend matching the cross-sectional shape of the discharge frame 50 in the vicinity of the end of the plate member on the discharge frame 50 side. The sandwiching portion 12 is not limited to an arc shape and may be bent into a polygonal shape as long as the discharge frame 50 can be sandwiched between the plate surfaces of a pair of plate members.

  It is preferable that at least one fastening portion 16a, 16b is provided in the vicinity of both end portions of the sandwiching portion 12 formed in the arc shape. In the present embodiment, since the bolts and nuts 17 are used as fastening means for fastening the fastening portions 16 (16a, 16b), through holes (through holes) penetrating the pair of plate members ( (Not shown). Note that the fastening means may be welding, clamping, or the like as long as the fastening can be performed securely (the same applies hereinafter).

  The leg portion 14 is formed with an open leg from the fastening portion 16 a provided on the discharge frame fixing beam 60 side to the discharge frame fixing beam 50. The leg 14 may be formed by bending the plate member. In addition, although it is possible to combine and form plate members by welding or the like, it is preferable to integrally form by bending when considering the labor required for formation and the strength of the members. In addition, the leg part 14 of this embodiment is provided with the through-hole 21 as the fastening part 20 for performing the fastening with the fixing member 18 mentioned later.

  In the present embodiment, when the leg portion 14 is fixed to the discharge frame fixing beam 60, a fixing member (for example, a channel material) 18 formed in a U-shape is used. This is because the discharge frame 50 is generally arranged vertically, whereas the discharge frame fixing beam 60 is generally arranged horizontally, and the bottom surface and the side surface are vertical. By interposing the fixing members configured in the above, the fixing surfaces of the plates (the plate surface of the plate member and the fixing surface of the discharge frame fixing beam) are respectively fixed by surface bonding.

  The fixing member 18 has a fastening portion 22 for disposing on the horizontal plane of the discharge frame fixing beam 60 so that the opening is on the upper surface. Further, on the plate surfaces 18a and 18b at both ends of the fixing member 18 to be erected vertically, there are provided fastening portions 20 for fixing the both leg portions 14 formed with the open legs. In order to firmly fix the fixing member 18 to the discharge frame fixing beam 60, a reinforcing member 24 may be provided.

  In the discharge frame support 10 having the above-described configuration, the vertically disposed discharge frame 50 is sandwiched by the sandwiching portions 12 of the discharge frame support 10 composed of a pair of plate members, and is provided in the vicinity of both ends of the sandwiching portion 12. The fastening portions 16 (16a, 16b) are fastened by bolts and nuts 17.

  On the discharge frame fixing beam 60 side, the fixing member 18 is fastened to the horizontal surface of the discharge frame fixing beam 60 by bolts and nuts 23. The legs 14 of the discharge frame support 10 are fastened to the plate surfaces 18 (18a, 18b) at both ends of the fixing member 18 by fastening means such as bolts and nuts.

  In the discharge frame support 10 as described above, since the discharge frame 50 arranged vertically is sandwiched between the plate surfaces of the plate member, the plate surface of the plate member is arranged along the vertical direction. For this reason, the intensity | strength improvement with respect to the vertical shaking of the discharge frame 50 and the dispersion | distribution of stress can be aimed at. Further, by adopting a configuration in which the leg portion 14 is fixed to the discharge frame fixing beam 60 in the open leg state, it is possible to improve the strength against rolling and to distribute the stress. FIG. 3A and FIG. 3B are graphs showing the maximum stress generated in a specific portion of the discharge frame support 10 corresponding to the shaking of the discharge frame 50, and are diagrams comparing with the conventional discharge frame support 10. Show. 3A shows the stress generated with respect to pitching, and FIG. 3B shows the stress generated with respect to rolling.

  As can be seen from FIG. 3, in the discharge frame support 10 of the present embodiment, it can be seen that the maximum stress generated when rolling occurs at a specific location is suppressed. This is because the location where the discharge frame support 10 is fixed to the discharge frame fixing beam 60 is changed from the conventional one location to two locations, and the leg portion 14 is formed as an open leg, so that the discharge frame support 10 itself rolls. By improving the strength against.

  In the discharge frame support 10 having the above-described configuration, the fixing member 18 has a U shape. However, if the fixing member 18 has an end face that can fix the plate surface of the leg portion 14 disposed horizontally, the fixing member 18 is a block. It may be a shape.

Next, a second embodiment according to the discharge frame support of the electric dust collector of the present invention shown in FIG. 4 will be described.
The configuration of this embodiment is substantially the same as the configuration of the first embodiment. Therefore, the parts having the same functions are denoted by the reference numerals of the first embodiment plus 100, and the detailed description thereof is omitted.

  The present embodiment is different from the first embodiment in that a fixing portion 118 formed integrally with the leg portion 114 is provided at the end of the leg portion 114 on the discharge frame fixing beam 60 (see FIG. 2) side. That is, in the first embodiment, when the leg portion 14 (see FIGS. 1 and 2) is fixed to the discharge frame fixing beam 60, a U-shaped fixing member (separate from the discharge frame support) 18 (see FIG. 2), the discharge frame support 110 of this embodiment does not require it.

The discharge frame support 110 of the present embodiment may be provided with a convex portion at the end portion 114a where the leg portion 114 is to be formed when the plate member is cut out (punched). The plate member configured in this way is bent as in the first embodiment. At this time, the convex portion may be bent to the outside or the inside of the leg portion 114 formed so that the plate surface is parallel to the flat portion of the discharge frame fixing beam 60.
Other configurations and operations are the same as those in the first embodiment.

Next, a third embodiment according to the discharge frame support of the electric dust collector of the present invention will be described with reference to FIG.
The configuration of this embodiment is substantially the same as the configuration of the first embodiment. Therefore, parts having the same function are denoted by a reference numeral obtained by adding 200 to the reference numerals attached to the drawings of the first embodiment, and detailed description thereof is omitted.

In this embodiment, it is different from 1st Embodiment that the plate member which forms the discharge frame support 210 was made into one sheet.
The present embodiment is characterized in that the sandwiched portion 212 is formed by bending the central portion of one plate member in the longitudinal direction. As a result, the number of constituent members can be reduced, and the discharge frame support 210 can be created simply by bending one plate member.

  In FIG. 5, the sandwiching portion 212 is provided at the center of one plate member, but a fastening portion is provided at both ends of the sandwiching portion 212 by bending one plate member. It is good also as such a structure.

In the discharge frame support 210 configured as described above, the discharge frame 50 is disposed between the leg portions 214 formed with the open legs, and the leg portions 214 are spread outward to spread the discharge frame 50 to the sandwiching portion 212. Insert. After the discharge frame 50 is inserted into the clamping part 212, the fastening part 220 provided at the leg 214 side end of the clamping part 212 is fastened with bolts and nuts (not shown). In addition, when fixing the leg part 214 to the discharge frame fixing beam 60 (refer FIG. 2), it follows a 1st embodiment.
Other configurations and operations are the same as those in the first embodiment.

Next, a fourth embodiment according to the discharge frame support of the electromagnetic dust collector of the present invention will be described with reference to FIGS.
The configuration of this embodiment is substantially the same as the configuration of the first embodiment and the second embodiment. Therefore, parts having the same function are denoted by a number obtained by adding 300 to the reference numerals attached to the drawings of the first embodiment, and detailed description thereof is omitted.

  In the present embodiment, a U-shaped plate member composed of longitudinal portions 315a and 315b formed symmetrically and a beam portion (fixed portion) 318 that bridges the longitudinal portions 315a and 315b. (Refer to FIG. 7) is different from the first and second embodiments in that the discharge frame support 10 and the fixing member 18 in the first embodiment are integrally formed.

  In the present embodiment, in the U-shaped plate member shown in FIG. 7, both longitudinal portions 315 (315a, 315b) are bent so that both plate surfaces face each other. A sandwiching portion 312 (see FIG. 6) and a leg portion 314 (see FIG. 6) are formed by using the longitudinal portion 315 facing the plate surface as a plate member in the first embodiment.

Other configurations and operations are the same as those in the first embodiment and the second embodiment.
In the above-described embodiment, it is described that the two legs are formed as an open leg. However, even if the number of legs is increased for the purpose of reinforcement or the like, When it has, it shall be included by embodiment of this invention.

It is a perspective view which shows 1st Embodiment which concerns on the discharge frame support of the electric dust collector of this invention. It is a figure which shows 1st Embodiment which concerns on the discharge frame support of the electric dust collector of this invention, Comprising: (A) is a top view, (B) is a right view, (C) shows a front view. It is a graph which shows peristaltic durability with the discharge frame support of 1st Embodiment, and the conventional discharge frame support, (A) shows the case where a discharge frame is shaken vertically, (B) is shaken sideways. It is a graph which shows a case. It is a perspective view which shows 2nd Embodiment which concerns on the discharge frame support of the electric dust collector of this invention. It is a perspective view which shows 3rd Embodiment which concerns on the discharge frame support of the electric dust collector of this invention. It is a perspective view which shows 4th Embodiment which concerns on the discharge frame support of the electric dust collector of this invention. It is a top view which shows the shape of the board member for forming the discharge frame support of 4th Embodiment. It is a figure which shows the relationship between the discharge frame support which concerns on this invention, and a discharge frame. It is a figure which shows the 1st form of the conventional discharge frame support, (A) is a top view, (B) shows a front view. It is a figure which shows the 2nd form of the conventional discharge frame support, (A) is a top view, (B) shows a front view.

Explanation of symbols

10, 110, 210, 310 ......... Discharge frame support, 12, 112, 212, 312 ......... Pinch, 14, 114, 214, 314 ......... Leg, 50 ......... Discharge frame, 60 ... ...... Discharge frame fixed beam.

Claims (1)

A discharge frame support for fixing a discharge frame of an electrostatic precipitator to a discharge frame fixing beam, and a clamping part that clamps and supports a discharge frame arranged vertically, and is fixed to the discharge frame fixing beam A leg part, the leg part is formed as an open leg , the sandwiching part and the leg part are constituted by a pair of plate members, and the plate member is arranged such that a plate surface is arranged vertically, and the plate surface Is fixed to fix the plate surface of the plate member and the fixing surface of the discharge frame fixing beam to each other by surface bonding. A discharge frame support for an electrostatic precipitator, characterized in that the structure is provided via a member .

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