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| Study on the Measurement of Pulverized-coal Concentration using Electrical Capacitance Tomography |
| LIU jing1,2,SUN Meng2,LIU Shi3 |
1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, Chian
2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080, China
3. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, North China Electric Power University, Beijing 102206, China |
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Abstract Based on electrical capacitance tomography, subtle mass flow measurement of pulverized coal pneumatically conveyed under normal temperature conditions is studied. To adequately make use of the capacitance sensors ensitivity field, a cyclone separator is set up in the experimental system, which could gather solid particles on wall areas, while the sensor pole is placed on straight section of the separator. The concentration is altered by changing the screw feeder speed and the suction amount on the top of the cyclone. The distribution of volume concentration in radial direction, the average volume concentration and the fluctuating characteristics are analyzed. The feasibility and reliability of the method are verified by experimental results.
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2011, Vol. 32 
