Measurement Of Solid Velocity And Concentration Of Gas-Solid Two Phase Flow

With the fast development of modern industry and the increasingly high demand for the detection and control of process parameters in industrial production, the accurate measurement of gas-solid two phase flow parameters for many manufacturing sectors, such as energy, chemicals, environment, meteorology, metallurgy, food and so on, has be playing an increasingly important role. At present, there are many kinds of methods and systems based on different principles based for parametric measurement of gas-solid two phase flow,which provid lots of theoretical basis and practical experience.There mainly study on the measurement of solid velocity and concentration of gas-solid two phase flow with electrostatic sensor in this paper. It proposes using cross correlation and spatial filter method for the measurement of solid velocity and concentration of gas-solid two phase flow. The main tasks are as following:(1) Study on characteristics of electrostatic sensor in depth and describe principle of electrostatic sensor in the patametric measurement of gas-solid two phase flow.(2) Improve the design of analog circuits, the input impedance automatic matching of preclass.(3) Program for ARM is modified and improved to achieve automatic gain function.(4) Detailed analysis is done on the algorithm of cross-correlation method velocimetry and the software implementation is made. including the calculation of cross-correlation, delay processing, interpolation processing and so on.(5) Simple analysis of the rms measurement of solid concentration.(6) Lots of repeated experiments are done for velocity measurement system of corss correlation method. In the laboratory conditions, the speed of the fluid between3m/s to13m/s, repeatability error less than2%.(7) A preliminary experiment to find any important factors, except concentration, affecting the rms.