Algorithmic Method for Precision Enhancement of Paper Pulp Blade Consistometer

: pp. 25 – 32
Received: November 07, 2016
Revised: December 12, 2016
Accepted: December 23, 2016
Lviv Polytechnic National University
Lviv Polytechnic National University
Lviv Polytechnic National University

The article deals with the algorithmic method for precision enhancement of paper pulp blade consistometers . In the said method, the current strength in the winding of a moving coil of a magnetoelectric transducer in the steady regime of sensor`s blade motion condition is measured during its movement in downstream and upstream directions. Thus, we can minimize the error resulting from the impact of changes in flow velocity relative to paper pulp measuring blade of the consistometer. Schematic diagram of a paper pulp consistometer with paper pulp flow velocity compensation is presented. Dependence of voltage and current versus time on the outputs of the main blocks of presented paper pulp consistometer with compensation of paper pulp flow velocity influence is considered. Influence of paper pulp flow velocity and consistency on the dependencies of current versus time for the coil of a magnetoelectric transducer of a paper pulp consistometer is described.

  1. Waller M. H. (1993) A tutorial on the measurement of paper stock consistency. ISA Transactions, 32, pp. 277–282.
  2. Osipov P. S., (editor) (2002) Technology of pulp and paper production, vol. 1. Raw materials and production of semi-finished products, Politehnika Publ., Saint Petersburg, 425 p. (in Russian)
  3. Schramm G. A. (2000) Practical Approach to Rheology and Rheometry. 2nd Edition, Gebrueder HAAKE GmbH, Karlsruhe, Federal Republic of Germany. – 291 p.
  4. Steffe J. F. (1996) Rheological Methods in Food Process Engineering. 2nd Ed. Freeman Press, East Lansing, MI, USA. – 418 p.
  5. Valmet Blade Consistency Transmitter – Valmet SP Installation and User's Manual, Valmet Automation Inc., Kajaani, Finland. – 2015.
  6. Metso Blade Consistency Transmitter. Installation and User's Manual K11389 V1.1 EN Metso Automation Inc. Documentation: Metso Automation / Marjo Nygård Copyright © December 2012.
  7. Wall, H. A. (1968) Consistency measuring apparatus.  US Patent No. US 3364730 A.
  8. “MBT-2500 User manual” (2007) BTG Pulp and Paper Technology AB, Säffle, Sweden.
  9. Skallen, B. (1989)    Method and apparatus for measuring the viscosity of a medium. US Patent No US4875362.
  10. Romaniuk, O. M., Kril, B. A., (2015) Precision enhancement of rotational viscometers by algorithmic method.  Materials of 2nd International scientific and technical conference “Modern methods, informational, programmable, and technical support of the organizational, technical and technological complex control systems”. Kyiv, NUFT, pp. 71–72 (in Ukrainian).
O. Romaniuk, B. Kril, O. Kril. Algorithmic Method for Precision Enhancement of Paper Pulp Blade Consistometer. Energy Eng. Control Syst., 2016, Vol. 2, No. 1, pp. 25 – 32.