This Patent Request has for object a New Model of Industrial Electrostatic Precipitador, provided with individual keys capable to connect/disconnect the high- voltage feeding of individual emission electrode when selected, in a way that the Automatic Control System of the Electrostatic Precipitador will be capable of, after programmed for such, effectuate an operation of selective connection/disconnection of emission electrodes for effective control of located sparking without the necessity of reduction of the tension in neighboring electrodes, where the sparking still is not established, due to the thinner thickness of the layer of collected material in the vicinity of such emission electrodes. A programming of connection/disconnection of more emission electrodes will be also possible, if thus desired, resulting in a greater flexibility of action for increases in the Mechanical Rapping (beating intervals). This New Model of Electrostatic Precipitador will have then a bigger Collection Efficiency and a bigger Useful Life in comparison to the Current Models, where such selective action is not possible, being the Current Models capable only of the simultaneous disconnection of all the emission electrodes of one same corridor (and of all the neighboring parallel corridors, as a matter of fact, in this operation) . Figure 1 shows a schematical drawing of the superior sight of three corridors of Electrostatic Precipitador of Current Model, where (1) is the direction of the flow, (2) is one of the four collecting plates, formed by rabbet segments, (3) is one of the 27 shown emission electrodes, (4) is the line of the emission electrodes in the vicinity of which the biggest accumulation of material occurs, (5) it is the line of the emission electrodes where the second biggest accumulation of material occurs as and (6) the thickness profile of the material collected along one of the collecting plate. An Industrial E.P. can have a great number of such parallel corridors being that, by project, parallel corridors , in one same longitudinal position of the flow, must treat effluent materials with same characteristic and are, therefore, identical between itself, what allows that the analysis made for one such corridor can be extended for the whole number of them in same Electrostatic Precipitador. During the research for the Ph.D. work of the author of this Invention Patent Request, a physical behavior in the interior of the corridor was identified, named by the author as Alternation Effect of the Electric Field, that explains the irregular accumulations of collected material, as schematized in figure 1 through the line (6), that shows the profile of the thickness of the collected material and

the lines (4) and (5) that show regions where located accumulations of material occur. This located reduction of the space between a specific emission electrode and the surface of the collected material results that accurately in this point the sparks occur. This is the phenomenon denominated in this Invention Patent Request as located sparking. All the Electrostatic Precipitators of the Current Model act on the problem of thjs located sparking reducing the tension in all the emission electrodes of the corridor. The New Model of E.P. considered in this Invention Patent Request will allow that the electrode, or electrodes, in which the sparking is established can individually be switched off, by action of Automatic Control System of the E.P. , programmed for such by use of specific information that indicate which is the position of the lines of electrodes where the located accumulations occur.

In the practice , we can wait that this action will be necessary only to a certain number of these lines, for example, for a corridor containing 18 emission electrodes , the disconnection of only 4 or 5 emission electrodes can led to a great increase in the Collection Efficiency and Useful Life of the E.P., meaning that the keying will be necessary only for these lines of emission electrodes. Figure 2 shows the localization of the keying for only two lines of emission electrodes.

This alternative of action allows that the E.P can continue operating with the remaining emission electrodes of the corridor still energized, what obviously will result in accumulation of material in another region of the corridor, and located sparking starting to occur there. The process of selective disconnection can be repeated, until, by decision of the Automatic Control System the Rapping (mechanical beating) is activated, and all the emission electrodes of the corridor in question are reconnected, restarting the process. The increase in the Rapping Intervals (that is, the decrease of Rapping Frequency) results then in the desired effect of increase of Useful Life and Collection Efficiency.

Figure 1 shows a schematical drawing of the superior sight of three corridors of Electrostatic Precipitador of Current Model, where:

(1) is the direction of the flow,

(2) is one of the four collecting plates, formed by rabbet segments, (3) is one of the 27 emission electrodes shown,

(4) is the line of emission electrodes where the biggest accumulation of material occurs,

(5) is the line of electrodes where the second biggest accumulation of material occurs and

(6) is the thickness profile of the collected material along one of the collecting plate.

Figure 2 shows the perspective sight of a corridor with installation of keying (6) of the emitting electrodes only for the lines (4) e (5), being there:

(1) is the direction of the flow,

(2) , is a collecting plate, formed by rabbet segments,

(3) is one of the 09 emission electrodes shown,

(4) is the line of the electrodes where the bigger accumulation of material occurs,

(5) is the line of electrodes where the second biggest accumulation of material occurs,

(6) are the keys with remote drive and

(7) is the common electric feeding bar of the corridor in question.