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Field of the invention
The present invention relates to an emitting wire adaptable in the emitting
systems of the electrostatic precipitators.
Background of the invention
The Electrostatic Precipitators (ESP ) , constitute basically a pollution control
equipment widely used for collecting dust particles from flue gas exhausted by
thermal power plants, cement plants, steel plants and glass plants etc.
The electrostatic precipitators are configured with number of field, which have
collecting and emitting electrodes. A high electric field is generated between the
electrodes to charge the dust particles and collect the charged particles on the
connecting electrodes. High voltage is generated by means of a high voltage
transformer-rectifier. Rapping mechanism is used for removing the connected
dust layer from the connecting electrodes.
Cold drawn austenitic stainless steel wire of dia 2.7 mm in a self tensioning
spiral spring type configuration is normally used as discharge electrodes' in the
Electrostatic Precipitator amongst other design of discharge electrodes. The
spiral spring type electrodes have significant electrical / mechanical properties
and are very efficient for high resistive dust collection in Electrostatic
Precipitators.

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The ends of the electrodes are provided with reinforced hooks, which together
with a special holder welded with frames, form a flexible link to prevent fracture
due to fatigue. As the cost of SS wire is ever-increasing, it has become essential
to propose an alternative emitting wire made of cheaper material, without
affecting the functional requirement of the emitting wire.
Objects of the invention
It is therefore an object of the invention to propose an emitting wire adaptable in
the emitting system of electrostatic precipitators.
Another object of the invention to propose an emitting wire adaptable in the
emitting system of electrostatic precipitators which is cost-effective with
improved functionality.
Summary of the invention
Accordingly, a specially constructed emitting wire is proposed. The new emitting
wire comprises a 2.5 mm AISI 316 wire as a core material, and a sleeve /
coating of suitable alloy material of about 0.1 mm thickness over the core
material which maintains the functional requirements of the emitting wire. The
new type of material used in configurating the emitting wire is cheaper than the
existing cold drawn austenitic stainless steel wire material but maintains better
functionality.
Dated this 21st day of SEPTEMBER 2007

Accordingly, a specially constructed emitting wire is proposed. The new emitting
wire comprises a 2.5 mm AISI 316 wire as a core material, and a sleeve /
coating of suitable alloy material of about 0.1 mm thickness over the core
material which maintains the functional requirements of the emitting wire. The
new type of material used in configurating the emitting wire is cheaper than the
existing cold drawn austenitic stainless steel wire material but maintains better
functionality.