Liquid Composition Sensor in Scaling Environment
AssigneeHoneywell ASCa Inc.
InventorSebastien Tixier
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Abstract
Scale formation on the electrode(s) of a liquor sensor can be prevented by continuously delivering a water-soluble scale inhibitor or dispersant into the vicinity of the electrodes of a liquor sensor device. Scale inhibitors include, for instance, polymers that are derived from acrylic acid, maleic acid, acrylamide acid, phosphonate, and combinations thereof. An aqueous mixture of scaling inhibitor continuously delivered to the probe tip of the liquor sensor that was placed in a kraft pulping liquor allowed the sensor to operate accurately for over a month without having to be cleaned of scale.
Claims20
A system for measuring a component in a liquid that comprises:
- a sensor device that is configured to be positioned in the liquid;
- a source of an aqueous mixture of scaling inhibitors;
- and
- means for continuously distributing an effective amount of the aqueous mixture of scaling inhibitors into the liquid in the vicinity of the sensor device, characterized in that scale deposition in the form of salts that are present in the liquid onto the sensor device is effectively controlled to permit continuous operation of the sensor device for more than a month without cleaning.
A sensor device for measuring one or more components in a liquid scaling environment that comprises:
- a plurality of electrodes that are configured to be positioned in the liquid scaling environment wherein at least one of the electrodes is supplied with a varying current;
- and
- a source of a scaling inhibitors that distributes the scaling inhibitors into the scaling environment in the vicinity of the plurality of electrodes as the sensor device measures the amounts of one or more components in the liquid.
Dependencies are inferred from the claim text.