公开(公告)号：US11666863B2

公开(公告)日：2023-06-06

申请号：US16632166

申请日：2017-07-18

Applicant: INVESTIGACIONES FORESTALES BIOFOREST S.A.

Inventor： Álvaro Mauricio González Vogel ,  Olli Pekka Joutsimo ,  Klaus Erwin Bornhardt Brachmann

IPC: B01D61/52 ,  B01D61/44 ,  B01D61/54

CPC classification number: B01D61/52 ,  B01D61/445 ,  B01D61/54 ,  B01D2321/223 ,  C02F2201/4613 ,  C02F2201/46175

Abstract: Methods and circuits for a device for interrupting concentration-related polarisation phenomenon and for self-cleaning of electromembrane processes by application of asymmetric inverse-polarity pulses with high intensity and variable frequency are described. The device, a bipolar switch, is based on the use of solid-state electronics to carry out polarity inversion in a range of frequencies, intensities and pulse widths to prevent or reduce formation of precipitates on the surfaces of the membranes. The inversion protocol, with a frequency that varies as a function of the appearance of dirt on the membranes, as measured by the decrease in voltage or electrical resistance of the membrane cell during electromembrane processes, is also provided. This device and configuration provides application of modulated and stable high-intensity pulses using a second power source. Electromembrane processes can be updated by replacing electrodes, suitable for polarity inversion, and adding a second power source and the bipolar switch described.