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

这个SBIR第二阶段项目是开发一个简单的， 用于测量固体负载的可靠在线技术， 气固混合物的气体流速。 该技术采用了 延伸喉管式文氏管流量计， 喉部和扩压器上的压力恢复是 测定了 这项研究包括对这种 空气流量计，用于在环境条件下测量各种气体的流量 速度、固体含量和颗粒大小。 数值 这种两相流的建模将提供一个框架， 预测设备的性能并扩展其 操作不同的条件。 正在开发的一种简单、坚固的装置， 气固两相在线监测与控制 过程，特别是在高温条件下， 更高的压力和更高的固体浓度。 该设备可以 可用于各种煤炭或矿物加工 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.