Development of Extended-Throat Venturimeter for On-Line Measurement of Gas-Solid Flows

在煤基能源系统的开发中，迫切需要能够在高温(高达1700oF)和高压(高达100atm)条件下测量气固悬浮液中固体和气体的流量的仪器。已经或目前正在研究几个仪器概念(即声波多普勒计、相关计、电容式换能器、科里奥利效应计和基于激光的装置)。尽管它们相当复杂，但许多都显示出一些希望，而其他一些需要更多的开发，或者将被限制在有限的流动条件下使用。这项提案代表了一项研究和开发创新的气固流量计的计划，该流量计目前正在能源国际公司与华盛顿州立大学合作开发。已进行的初步技术和系统研究表明，延长典型测风仪的喉部将提高设备的灵敏度。进一步的实验和分析表明，这种加长喉道流量计将能够测量固体和气相的流量，而不需要颗粒尺寸信息。主要研究人员完全有资格进行这项研究，强烈建议提供资助。这是针对小企业创新计划征集的第一阶段，NSF 86-19。

In development of coal-based energy systems, there is an acute need for instrumentation capable of measuring flow rates of solids and gas in gas-solid suspensions under high temperature (up to 1700oF) and high pressure (up to 100 atm) conditions. Several instrumentation concepts have been or are currently under study (i.e., sonic Doppler meters, correlation meters, capacitive transducers, Coriolis-effect meters, and laser-based devices). Many show some promise, although they are quite complex, and others require considerably more development or will be restricted to use only in limited flow conditions. This proposal represents a plan for investigation and development of an innovative gas-solids flow meter currently under development at Energy International, Inc., in cooperation with Washington State University. Preliminary technical and system studies conducted have shown that extending the throat of a typical venturimeter will improve the sensitivity of the device. Further experiments and analysis have shown that the extended-throat venturimeter will be capable of measuring flow rates for both the solids and gas phases without requiring particle size information. The principal investigators are well qualified to conduct this research, and a grant is highly recommended. This is for Phase I of the Small Business Innovation Program Solicitation, NSF 86-19.