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

SBIR第二期项目旨在开发一种简单可靠的在线技术，用于测量气固混合物的固体载荷和气体流速。该技术采用了一个扩展喉部风压计，测量了喉部的压降和扩压器的压力恢复。该研究包括在环境条件下对这种风压计进行实验测试，测试范围包括气体速度、固体载荷和颗粒大小。该两相流的数值模拟将为预测该装置的性能和将其扩展到不同条件下提供一个框架。需要一种简单、坚固的设备来在线监测和控制气固过程，特别是在高温、高压和高浓度固体条件下。该装置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.