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Flow regime determination in horizontal hydrotransport using non-intrusive acoustic probes

✍ Scribed by Katherine Albion; Lauren Briens; Cedric Briens; Franco Berruti

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 759 KB
Volume: 86
Category: Article
ISSN: 0008-4034
DOI: 10.1002/cjce.20112

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✦ Synopsis

Abstract

A variety of flow regimes may be observed in the hydrotransport of solids. Maintaining a consistent operation requires rapid detection of any change in flow regime. The objective of this study was to develop reliable, non‐intrusive, and on‐line methods for flow regime detection in a hydrotransport pipe based on acoustic measurements.

Slurries were transported in a 0.05 m diameter stainless steel hydrotransport pipe. Acoustic measurements were recorded by microphones along the length of the horizontal pipe. Two flow regimes were observed: suspended solids flow and flow over settled solids. Cycle and frequency analyses of the acoustic signals provided reliable identification of these flow regimes.

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A variety of flow regimes may be observed in dilute phase pneumatic transport of fine powders. As the gas flow rate is reduced or the solids flow rate increased, particles may settle on the bottom of the horizontal sections, forming either a stagnant layer or slowly moving dunes. This change in flow