Claims:WE CLAIM:
1. Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator comprising a reinforcement plate secured to collecting electrode towards the top half of opening thereof, wherein a wire is disposed between the electrode and reinforcement, which is positioned at one end of said opening and aligned in the longitudinal direction of the reinforcement.
2. Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator as claimed in claim 1, wherein the reinforcement forms a single sheet member, which is held to said collecting electrode by being bent at both ends thereof.
3. Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator as claimed in claim 1 or 2, wherein both the ends are placed opposite to each other, out of which one end is in contact with the opening edge of said electrode and other end establishes contact with one edge of the electrode.
4. Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator as claimed in any of the preceding claims, wherein the reinforcement can have various profiles including rectilinear, semi oval corresponding to that of the electrode opening.

5. Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator as claimed in any of the preceding claims wherein the material of the reinforcement member may be same or different from that of the electrode.
6. Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator as claimed in any of the preceding claims wherein strength and thickness of the reinforcement is atleast equal to that of the collecting electrode.
7. Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator as claimed in any of the preceding claims wherein the wire is held in position by means of the reinforcement plate, which imparts additional damping in the course of rapping of the collecting electrodes.
8. Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator as claimed in any of the preceding claims is associated with the advantageous features such as herein described.
, Description:Reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator
FIELD OF INVENTION
[001] This invention is related to reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator. More particularly, the present invention makes a disclosure regarding a provision for reinforcing the hanging eye of the collecting electrode of said precipitator so as to avoid local shearing owing to overloading.

BACKGROUND OF INVENTION

[002] Implementation of collecting electrodes as ash collecting members in electro static precipitator has been recognized attractive as compared to bag filters due to its cost and maintenance in the fields of thermal energy, Processes industries like cement, paper, fertilizers and glass etc. In these Electro static precipitator, flue gas passes through a series of collecting and emitting electrodes which normally charges the ash particles in the flue gas and gets collected on the collecting electrode plates. When the ash gets collected on the collecting electrode, the same is dislodged by rapping the shock bar connected at the bottom of the collecting electrode at a prescribed frequency. This collects the ash into the hoppers installed at the bottom of the electrostatic precipitator.

[003] In Electro static precipitators, collecting electrodes are suspended like curtains on suspension hooks through the openings provided in collecting electrodes, wherein the hooks are welded to suspension bar of said precipitator. The self-weight of collecting electrodes, weight of shock bar, weight of the collected ash, drag force of the ash in case of hopper filled and shock loads of rapping are to be supported at the suspension location by means of the collecting electrode.

[004] The safe design of suspension arrangement is very critical in reliable operation of Electro Static Precipitator as any failure in collecting electrode will have impact on ESP performance as well as on environment.

PRIOR ART

[005] Normally collecting electrodes are suspended on suspension hooks of a suspension bar. The collecting electrodes are obtained with opening of a particular geometry at one end and suspended on to the hooks or hangers. The bottom portion of the collecting electrode is fastened with shock bar so as to transmit the rapping forces from hammer to collecting electrode. Collecting electrodes are manufactured from very thin sheets in order to have effective rapping acceleration on plate to dislodge the collected ash particles. Further, additional re-enforcement plate is provided to strengthen the opening at suspended location. However, during over loading of ESP due to poor maintenance (i.e. improper ash evacuation from hopper), the collecting electrode gets sheared off.
[006] In view of the above, it is required to devise a suitable reinforcement for reinforcing the opening of said collecting electrode to prevent shearing off of said collecting electrode.

[007] Now, reference may be made to US patent no 5665147, in which a flange with downward fingers is connected to the upper end of the collecting electrode which abut the bent portion of the collecting electrode. The flange is generally bolted, riveted or welded to the collecting electrode plate. Top of the flange is fastened to the suspension bar or bracket by bolting or welding. Here, the flange supports the entire load of the collecting plate and ash load.

[008] However, the above technology can’t serve the purpose for which the present invention has been designed. Hence the present invention introduces reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator.

OBJECTS OF THE INVENTION

[009] An object of the invention is to provide reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator which obviates shortcomings of the prior art.

[0010] Another object of the invention is to provide reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator which is simple in construction and effectively serves the purpose.

[0011] Still another object of the present invention is to provide reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator which avoids shearing of the collecting electrode due to overload and shockloads by avoiding stress concentration at the support location.

[0012] Yet another object of the present invention is to provide reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator which provides a suspension support for the collecting electrode in electro static precipitator.

[0013] Further object of the present invention is to provide reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator which reduces the peak stress and redistributes the stress pattern so as to avoid crack initiation and shearing of the collecting electrode at the suspension support.

SUMMARY OF THE INVENTION

[0014] According to this invention, there is provided reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator comprising a reinforcement plate secured to collecting electrode towards the top half of opening thereof, wherein a wire is disposed between the electrode and reinforcement, which is positioned at one end of said opening and aligned in the longitudinal direction of the reinforcement.

[0015] The reinforcement forms a single sheet member, which is held to said collecting electrode by being bent at both ends thereof.

[0016] Both the ends are placed opposite to each other, out of which one end is in contact with the opening edge of said electrode and other end establishes contact with one edge of the electrode.

[0017] The reinforcement can have various profiles including rectilinear, semi oval corresponding to that of the electrode opening.

[0018] The material of the reinforcement member may be same or different from that of the electrode.

[0019] Strength and thickness of the reinforcement is atleast equal to that of the collecting electrode.

[0020] The wire is held in position by means of the reinforcement plate, which imparts additional damping in the course of rapping of the collecting electrodes.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0021] The above brief description, as well as further objects, features and advantages, of the present invention will be more fully appreciated by reference to the following detailed description of the presently but nonetheless illustrative embodiment in accordance with the present invention, when taken in connection with the accompanying drawings in which these features of the present invention will become more apparent upon reference to the drawings, wherein:
Fig. 1 shows: Isometric view of reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator according to present invention.
Fig. 2 shows: Another view of fig. 1 with collecting electrode of invention.
Fig. 3 shows: Sectional view of fig. 1 in accordance with the invention.
DETAIL DESCRIPTION OF THE PRESENT INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS
[0022] The instant invention pertains to a technology directing to reinforcing means to prevent local shearing of collecting electrode for electrostatic precipitator. Now, reference may be made to fig. 1 and 2 illustrating one embodiment of the present invention. Here, the reinforcing means includes a reinforcement (100) secured to underlying collecting electrode (101). The electrode constitutes a sheet member.

[0023] The reinforcement (100) forms a single sheet member having substantially a trapezoidal section as shown.

[0024] The reinforcement member is held to the collecting electrode by being bent at both ends thereof as shown. Both the ends are placed opposite to each other, out of which one end is in contact with the opening edge of said electrode and other end establishes contact with one edge of the electrode.

[0025] The reinforcement can have various profiles corresponding to that of the electrode opening such as rectilinear, semi oval etc without restricting scope of the invention to the same. Thus, other configurations readily apparent to a person skilled in the art are understood to be within purview of invention.

[0026] The reinforcement member is attached to said collecting electrode towards the top half of the collecting electrode opening in order to strengthen the supporting area of said collecting electrode. The reinforcement plate also strengthens the corners of said collecting electrode opening so as to avoid peak stress at the corners thereof.

[0027] Provision of the reinforcement reduces the peak stress at the contact location of suspension hook and collecting electrode of electrostatic precipitator.

[0028] The material of the reinforcement member may be same or different from that of the electrode. However, strength and thickness of the reinforcement is atleast equal to that of the collecting electrode. This implies that, strength and thickness of said reinforcement can be more than that of the electrode as well.

[0029] Further, the material of reinforcement can be sheet metal of HYSD, which can be manufactured by forming without limiting scope of the invention to the same. Thus, other materials and methods readily apparent and practically adoptable by a person skilled in the art are understood to be included in the invention.
[0030] In conjunction with the above, there is provision of an additional wire (102), for which reference may be made to figure 3. Said wire is disposed between the electrode and reinforcement. The wire is positioned at one end of the opening of said electrode, in which the wire is aligned in the longitudinal direction of the reinforcement best seen in figure 3. The wire is held in position by means of the reinforcement plate, which imparts additional damping in the course of rapping of the collecting electrodes. This avoids initiation of crack on the collecting electrode.

[0031] The wire imparts additional damping to the shock loads in order to avoid crack initiation.

[0032] Thus, the combination of the reinforcement plate and wire gives rise the reinforcing means, with the aid of which stress redistribution around the collecting electrode opening is accomplished so as to avoid shearing of the collecting electrode.

[0033] Advantageous features of the invention can be listed hereinunder:-

- Full proof support to the collecting electrode.
- Limits stress in the collecting electrode under the self-weight, overload, shock loads and ash loads.
- Avoids initiation of crack in the collecting electrode.
- Provides damping effect.
- Provides additional factor of safety by strengthening the coroners of the collecting electrode openings and reducing peak stresses.
- Altering the stress distribution around the opening of the collecting electrode
- Shifting the peak stress location away from the corner of the collecting electrode opening and from the area of bending load to the area of tensile load.

[0034] It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:-