Electro Static Precipitator
Basic Working Principle of ELECTRO STATIC PRECIPITATOR (ESP)
In high- voltage electrostatic field, affected by the electric field force, gas ionization takes place. There are tremendous amount of electrons and ions existing in the ionized gas. After the dust particles are combined with these electrons and ions, they will be polarized, most of them are negatively polarized. Under the action of the field force, negatively charged particles migrates towards the positive electrode and in turn release electrons and attach to the positive electrode.
When the particles agglomerate and the layers reaches a certain thickness on the plate, rapping system will start to work and the particles will be dislodged from the collecting plate by vibration and falling into the hopper. That ends the collection process.
Special features of UNICON ESP:
Collecting electrodes are Cold roll formed with shape provided to ensure stiffness and to enhance rapping characteristics
Individual Collecting electrodes are suspend from top to form a curtain. This also ensures that the Collecting system is not bulky and thus ensures good rapping characteristics.
Discharge electrodes are stretched spring coils of small lengths. This ensures that the straightness of electrodes are maintained easily and alignment of electrodes with respect to the collecting system is easily ensured.
Rapping system is the tumbling hammer type. Each electrode row is rapped individually. This has the advantage of low re-entrainment and effective rapping. Each rapping system can be tuned to rapping cycle suitable to the dust load handled by that field.