Development of an Extended-Throat Venturimeter for On-Line Measurement of Gas-Solid Flow.

摘要

A combined experimental and numerical research study was conducted to examine the feasibility of the extended-throat venturimeter for metering the flow rate of each phase in a gas-solids flow. The basic concept of the present metering scheme is to determine the flow rates of both solid and gas, based on the measurement of the pressure drop across the extended-throat and the pressure recovery across the diffuser. A venturimeter with a throat diameter to inlet pipe diameter ratio of 0.5 was tested under a variety of solid loading, particle size, and particle type conditions. A model based on the state-of-the-art numerical modeling scheme was also developed to better understand and predict the complex interaction between the gas and the particles in the venturimeter. The results confirm that the present metering scheme is feasible and that it would provide an acceptable meter for industrial applications.