Litteris et Artibus
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Item Algorithmic method of precision enhancement of paper pulp blade consistometers(Lviv Polytechnic Publishing House, 2016) Romaniuk, Oleksandr; Kril, Bohdan; Kril, Danylo; Kokoshko, Roman; Lviv Polytechnic National UniversityThe algorithmic method of precision enhancement of the paper pulp blade consistometers is considered. In the said method the current strength in winding of the moving coil of the magnetoelectric transducer in the steady regime of sensor`s blade motion condition is measured during its movement in downstream and upstream directions. By processing this data the errors, caused by the influence of the moving medium on the consistometer sensitive blade can be considered and excluded.Item Improvement of the mechanical consistometers for paper pulp(Видавництво Львівської політехніки, 2017-12-23) Romaniuk, Oleksandr; Kril, Bohdan; Kril, Oleksandr; Lviv Polytechnic National Universityhe purpose of this work is to improve the rotational and blade type mechanical paper pulp consistometers for enhancement of their metering characteristics and reducing the influence of pulp flow velocity, friction torques in shaft sealing and bearings on the measured pulp consistency. These goals are achieved by algorithmic control of the sensor motion velocity and algorithmic processing of measured data. The designs of upgraded rotational and blade consistometers are presented.Item Development of flow meters and assistive devices for the technological air and carbon dioxide accounting(Видавництво Львівської політехніки, 2017-12-23) Kokoshko, Roman; Kril, Bohdan; Kril, Olexandr; Lviv Polytechnic National UniversityResult of development and implementation of gas flow rate measurement system for rapidly varying flows are considered in this paper. The flow rate meters in this system are based on pressure differential devices with fast processing of flow rate calculation algorithm by PLC`s united into a network and integrated in SCADA.Item Development of analyzer for paper stock concentration measurement(Lviv Polytechnic Publishing House, 2015) Romaniuk, Oleksandr; Kril, Bohdan; Lviv Polytechnic National UniversityMeasurement and regulation of paper stock concentration is of great importance in pulp and paper industry Deviations of concentration from the optimal value lead to deterioration of the product quality and can damage technological equipment of the factory. As a result a necessity of paper stock concentration measurement arises. In this article the improved rotational method of paper stock concentration measurement is examined, that is based on indirect measurement of concentration by viscosity. The influence of temperature on the measurement results was studied. The main sources of errors in concentration measurement by means of viscometer method were analyzed. A principle of improving accuracy of a paper stock rotational consistency meter is presented and a structural scheme of its realization is designed.