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Apparatus with flow-through capacitors for the purification of a liquid and process for the purification of said liquid

  • US 10,287,191 B2
  • Filed: 11/15/2013
  • Issued: 05/14/2019
  • Est. Priority Date: 11/15/2012
  • Status: Active Grant
First Claim
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1. Apparatus with flow-through capacitors for the purification of a liquid, such apparatus comprising:

  • at least one cell which is provided with at least one flow-through capacitor provided with two or more electrodes facing each other, between which a liquid to be treated containing ionized particles is susceptible to flow;

    an electrical power supply adapted to supply a direct current supply voltage (VA);

    a modulation circuit electrically connected in input to said electrical power supply in order to receive said direct current supply voltage (VA), electrically connected in output to said at least one flow-through capacitor and provided with at least one switch actuatable to apply at least one operating voltage between the facing electrodes of said at least one flow-through capacitor;

    a control circuit connected to said at least one switch and provided with a control module with pulse width modulation (PWM), wherein said control circuit drives the switching of said at least one switch so that said at least one switch supplies power to said facing electrodes with at least one pulsed voltage having average value proportional to said operating voltage;

    wherein said pulsed voltage has rectangular waveform having a duty cycle adjustable by said control circuit, so that said pulsed voltage having rectangular waveform is applied to said at least one flow-through capacitor;

    wherein said pulsed voltage has a frequency greater than about 30 Hz.

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