Honeywell International Inc.

Manpreet S Sidhu

Richard J Van Fleet

Ulysse S Dos Santos

Michel R Dion

An apparatus and method for sensing characteristics of a liquid are disclosed. The exemplary embodiment may have an electrode for transmitting electrical signals associated with characteristics of the liquid to and from the liquid. The electrode may have an aperture on the interior of the electrode with the aperture surface in contact with the liquid. The electrode may have a sensor portion in contact with the liquid and a coupling portion with a tapered thread. The electrode may contain an electrical coupling on the isolated outer surface of the electrode for communicating the electrical signal from the electrode.

Electrode

Thermomechanical pulp is an important process for producing fibrous mass used in papermaking. A two-level control strategy that stabilizes and optimizes the refining process has been developed. The Stabilization layer consists of a multivariable model predicative range controller that regulates the refiner line operations. The Quality Optimization layer provides the pulp quality control as measured by an online pulp quality (freeness, fibre length) sensor. This control startegy leverages the natural decoupling in the process. The modular design technique is able to handle multiple refiner lines that empty into a common latency chest. A global optimizer is also used to integrate and coordinate the two layers for enhanced constraint handling.

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Vancouver, Canada

Manpreet S Sidhu