Components for Electrostatic Precipitators – Mechanical
Imeco is manufacturing and supplying all the major mechanical internals for Electrostatic Precipitators including Collecting Electrodes, Discharge / Emitting Electrodes, Rapping Mechanism including Hammers / Bearings, Gas Distribution Screens, Frame Assemblies, Inspection Doors, Hopper Discharge Systems, etc for all major designs.
Collecting Electrodes
 Collecting plates are designed to receive and retain the precipitated particles and then removed into the hopper. In addition, the collecting plates are part of the electrical power circuit of the precipitator. Baffle plates shield the precipitated particles from the gas flow and smooth surfaces provide for high operating voltages. Collecting plates are suspended from the precipitator casing and form the gas passages of the precipitator.
Collecting plates are connected at or near the center by rapper beams, which then serve as impact points for the rapping system. Top, center, or bottom spacer bars may be used to keep the collecting plates aligned. This maintains electrical clearances to the discharge system. ESP Collecting Electrodes are manufactured from steel strip which is cold rolled formed to the desired profiles.
Imeco has automatic Cold Rolling Machines installed at the Kharagpur Works to manufacture all profiles of Collecting Electrodes of width upto 1260mm and length upto 20 meters. Presently the profile range includes Flakt, Lurgi (CSV and ZT), Research Cottrell, Lodge Cottrell, Russian, Peabody etc. Imeco is also equipped customize the specific requirements for their valued customers.
Discharge Electrodes
 Discharge electrodes emit charging current and provide voltage. This generates an electrical field between the discharge electrodes and the collecting plates. The electrical field forces dust particles in the gas stream to migrate towards the collecting plates. Finally the particles precipitate onto the plates. Imecos’ range of discharge electrodes include the following: -
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Straight Round Wires |
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Rigid Frames |
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Twisted pairs of Wires |
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Rigid Spiked Pipes |
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Barbed Discharge Wires |
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Spiral Wires |
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Rigid Masts |
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Etc |
Discharge electrodes are typically supported from the upperdischarge frame and are held in alignment between the upper and lower discharge frames. The upper discharge frame is in turn supported from the roof of the precipitator casing.
Imeco has manufactured and supplied millions of Discharge / Emitting Electrodes of various standard and customized designs as per specific requirements.
Gas Distribution Screens
These Screens are of modular design manufactured out of Steel sheets and hang within a frame work in the Electrostatic Precipitator inlet casing to maintain uniform distribution pattern of gas flow throughout the cross section of ESP.
Rapping Mechanism
 The whole emitting frame system is suspended from the roof through Supporting Insulator to avoid any short-circuiting.
The Rapping Mechanism Shaft for electrodes is connected to the driving mechanism through Shaft Insulator.
The collecting electrodes are fixed loosely to suspension beams on pins. They are joined together in the bottom rapping beam. Both, the firm bottom and the top loose attachment provide a perfect transfer of energy from the rapping hammers to the entire row of collecting electrodes. The rapping is carried out in regular, programmed intervals and guarantees removal of deposited dust from the electrodes to the hoppers.
Hammers strike the collecting plates and rigid electrodes directly, so that all areas receive proper rapping acceleration and no energy is lost to support structure.
Apart from the complete Rapping system, Imeco is also meeting requirements of various replacements parts including Inner / Outer Arms, Plain Bearings, Shock Bars / Pads / Guides etc. |
