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

该SBIR第二阶段项目是开发一种简单而可靠的在线技术，用于测量气固混合物的固体负荷和气体流量。该技术采用了加长喉管测压仪，测量了喉管的压降和扩散器的压力恢复。这项研究包括在一定的气体速度、固体负荷和颗粒大小范围内对环境条件下的空气进行这种通气量计的实验测试。这种两相流的数值模拟将为预测设备的性能和将其扩展到不同的条件提供一个框架。特别是在高温、高压和高固体浓度的条件下，需要一种简单、坚固的装置来在线监测和控制气固两相过程。该设备可用于任何数量的煤炭或矿物加工应用。

This SBIR Phase II project is to develop a simple and robust on-line technique for measurement of solids loading and gas flow rate of gas-solid mixtures. The technique employs an extended throat venturimeter for which the pressure drop across the throat and the pressure recovery across the diffuser are measured. The research includes experimental testing of such a venturimeter for air at ambient conditions over a range of gas velocities, solids loadings, and particle sizes. Numerical modelling of this two-phase flow will provide a framework for predicting the performance of the device and extending its operation to different conditions. A simple, robust device of the type being developed is needed for on-line monitoring and control of gas-solids processes, especially under conditions of high temperatures, high pressures, and high solids concentrations. The device may find use in any number of coal or minerals processing applications.