Process for regulating a paper pulp deinking line and device for continuously measuring the quantity of particles contained in a liquid

A device for continuously measuring a quantity of two different physical states of microscopic particles suspended in a liquid, said device comprising:

• a separation assembly having an input portion for receiving liquid from an input pipe, said separation assembly providing means for separating particles according to the size of the particles;
• a measurement and process assembly comprising at least two channels or ducts that are connectable to an output portion of said separation assembly, each of said at least two channels or ducts providing passage of a particular size of separated particles toward a measurement zone, and each respective channel comprising a translucent window in the measurement zone;
• a measurement and capture unit comprising means for illuminating each translucent window, means for optical recording, and means for digitizing an output of said means for optical recording:
• said means for optical recording comprising at least two cameras, each camera being opposite a respective translucent window;
• said means for optical recording and said means for illuminating being synchronized so as to capture an image of the translucent window at periodic intervals;
• said means for digitizing including means for processing each captured image by a respective camera and digitizing each captured image to determine a size and quantity of particles;
• and
• an output unit for receiving data processed by said means for digitizing, said output unit providing data received in at least one of an analog and a digital format so that said output unit is actuable by receipt of the processed data.

A device for continuously measuring a quantity of ink particles in a suspension of paper pulp coming from recycled paper, the ink particles being one of two physical states, detached from fibers within the pulp or attached to fibers within the pulp, said device comprising:

• a separation and washing assembly providing means for separating the ink particles into ink-fiber detached stage and ink-fiber attached stage and for washing the ink particles, said separation and washing assembly being continuously fed with paper pulp via an input pipe;
• a measurement and process assembly comprising at least two channels or ducts that are connectable to said separation and washing assembly, each one of said at least two channels or ducts providing passage of a particular size of separated particle, and each channel or duct comprising a translucent window in the measurement zone;
• a measurement and capture unit comprising means for illuminating each said translucent window, means for optical recording, and means for digitizing an output of said means for optical recording;
• said means for optical recording comprising two cameras, each one camera being opposite a respective translucent window;
• said means for optical recording and said means for illuminating being synchronized so as to capture an image of said translucent window at periodic intervals;
• said means for digitizing including means for processing each captured image by a respective camera and for digitizing each captured image to determine a size and quantity of particles;
• and
• an output unit for receiving data processed by said means for digitizing, said output unit providing data received in at least one of an analog and a digital format so that said output device is actuable by receipt of the processed data.