Proof of concept test and evaluation, Lasentec refining sensor
The Scanning Laser Microscopes (SLM) LAB-TEC 150 and PAR-TEC 200, were evaluated as instruments for monitoring fiber development during refining. The LAB-TEC 150 did not produce repeatable results which could be related to fiber development, as measured by Canadian Standard Freeness or hand sheet physical strength properties. The PAR-TEC 200 was found to correlate to strength development (Burst and Tensile Indices) during the first stages of laboratory Valley beating of bleached hardwood and softwood pulps. Preliminary testing of the PAR-TEC 200 in a pilot scale refining circuit was inconclusive. The influence of several process variables on instrument readings was investigated including flow rate, probe position and consistency. It is likely that a dual sensor system would be required in a commercial mill environment, to eliminate the effect of process variables. The next phase of the evaluation and development program will include two investigations: (1) A more scientific evaluation of which changes in fiber morphology the sensor is detecting during refining, and (2) a continuation of the in-line development; with a goal of eliminating process flow variables, and more accurately monitoring fiber development, by the use of two sensors, one before and after refining.
- Research Organization:
- Herty Foundation, Savannah, GA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-89CE40908
- OSTI ID:
- 5160118
- Report Number(s):
- DOE/CE/40908-T1; ON: DE92001743
- Country of Publication:
- United States
- Language:
- English
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MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
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PROGRESS REPORT
TENSILE PROPERTIES
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