用传热法测量燃煤锅炉气力输送中煤流量的研究

A New Method for Measuring the Solid Flow Rate in Gas Solid Two Phase Flow

将一电加热的传感探头置于气固两相流中，不同流速、浓度及颗粒直径的流动介质将与探头产生不同的传热效果，在确定的输送风量（风速）条件下，根据探头的电加热功率和测取探头的表面温度来测取气固两相流中的固相流量。在模拟稀相气力输送的试验台上，对窄筛分石英砂做了大量不同条件下的输送实验及测量。研究结果表明，本文首次提出的传热法为稀相气力输送中固相流量的测量提供了一种简单、可靠的新方法。

This paper introduces a new method for measuring the solid flow rate in gas solid two phase flow.An electrically heated probe was put in a gas solid two phase flow.The flow mediums with different velocity of flow,densities and diameters of particles produced different results of heat transfer.For a certain velocity of conveyer air,the solid flow rate could be determined by the heating electric power and the superficial temperature of the probe.Experiments were made on a pilot gas solid conveyer device.Research results prove that the method works effectively and reliably.