DEVICE TO MEASURE DENSITY, PULP AERATION DEGREE AND MASS CONCENTRATION OF SOLIDS IN PULP (ATS GAUGE) Russian patent published in 2014 - IPC G01N9/00 

FIELD: instrumentation.

SUBSTANCE: device comprises a measuring buoy set in a dashpot fitted by a flap in its lower part. The measuring buoy is suspended to a force strain gage with the output of latter being connected to the input of a microcontroller. The device is equipped by a movement mechanism connected by a rod to the dashpot flap. The microcontroller controls the movement mechanism. The device is operated in cycles. An operation cycle starts with the measurement of the buoy weight at the lower dashpot part being open. The aerated pulp density is calculated, then the flap affected by the movement mechanism provides for closing of the lower dashpot part leaving a slot for the settled solids to get out. Air bubbles escape the dashpot and the buoy weight in the deaerated pulp is measured, then the deaerated pulp density is calculated. Basing on the density values of the aerated and deaerated pulp the microcontroller calculates the pulp aeration degree - the percent voluminous content of air in the pulp. Similarly according to the relevant formula the microcontroller calculates the mass concentration of solids in the pulp. The data on the density values of the aerated and deaerated pulp, pulp aeration degree and mass concentration of solids in the pulp are transferred via a digital communication channel of the microcontroller to the upper level of automated control system and in the form of output analogous microcontroller signals to the external control units. Control of the device (view of current values, setting, entering of constants) is carried out via a display and keyboard as per the heading in "Menu" mode.

EFFECT: development of a device to measure density, pulp aeration degree and mass concentration of solids in the pulp.

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