Concentration measurement of biomass/coal/air three-phase flow by integrating electrostatic and capacitive sensors

Zhang, Juan; Hu, Hongli; Dong, Jun; Yan, Yong

doi:10.1016/j.flowmeasinst.2012.03.003

Cited by 30 publications

(13 citation statements)

References 14 publications

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“…To further improve the measurement precision of the concentration measurement system, some intelligence algorithms, such as the dual regression analysis [25], adaptive network based fuzzy inference system [3] and the adaptive wavelet neural network [21], can be used to built data fusion models instead of fitted equations.…”

Section: Verification Testsmentioning

confidence: 99%

Simulation Analysis of Capacitance Method in Two-Phase Flow Concentration Measurement by Coupled Fields

Wang

et al. 2016

Preprint

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This paper proposed three-dimensional numerical simulation method by coupling of electrostatic and fluid fields to evaluating the performance of electrical sensor in the concentration measurement of gas/solid two-phase flow. Compared with the static numerical simulation, this real-time dynamic 3-D simulation method can research on a designed capacitance sensor combining the dynamic characteristics of the two-phase flows for concentration measurement. Several fluid-electrostatic models of transmission pipes with different sensor structures are built. Under different test positions and different particle concentrations, the flow characteristics and the corresponding electric signals can be obtained, and the correlation coefficient between the concentration values and the capacitance values are used for performance evaluation of the sensors. The effects of flow regimes on concentration measurement are also been investigated in this paper. To validate the results of simulation, an experimental platform with horizontal straight pipe for phase volume concentration measurement of solid/air two-phase flow is built, and the experimental results agree well with simulation conclusions. The simulation and test results show that the coupling models can give constructive reference opinions for the sensor design and collection of installation position in different transmission pipelines, which are very important for the practical process of pneumatic conveying system.

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Section: Verification Testsmentioning

confidence: 99%

Simulation Analysis of Capacitance Method in Two-Phase Flow Concentration Measurement by Coupled Fields

Wang

et al. 2016

Preprint

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“…Various techniques including pressure/differential pressure, electrostatic, optical fibers have been developed to analyze fluctuation signals and identify flow regimes or characterize the hydrodynamics in gas‐solid flows. However, due to the complex nature of gas‐solid two phase flow systems and various origins of the signals, valuable and meaningful information is very hard to obtain .…”

Section: Introductionmentioning

confidence: 99%

Multi‐scale analysis of acoustic emission signals in dense‐phase pneumatic conveying of pulverized coal at high pressure

Yang

Huang

et al. 2016

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com) Acoustic emission technique in conjunction with multiscale processing method has been utilized to investigate the flow behavior of the dense-phase pneumatic conveying system at high pressure. A clearly defined classification of microscale, mesoscale, and macroscale signals has been put forward with the aid of wavelet transform and V statistics analysis. The detailed signals d 1 -d 4 , d 5 -d 7 , d 8 -d 10 were recomposed into the microscale, mesoscale, and macroscale signals, respectively, which represent microscale particle-wall interactions, mesoscale interaction between gas phase and solid phase (such as bubbles, plugs, dunes), and macroscale flow-induced pipe vibration. Further analysis shows that as the mass flow rate of pulverized coal increases, the energy fraction (energy of detailed signal divided by the energy of original signal) of microscale signals decreases while that of mesoscale signals increases, which indicates that particles are more likely to move as particle aggregates than individual particles when mass flow rate increases.

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“…Preliminary industrial-scale tests of PF flow and coal-biomass mixture flow were also conducted on a 150 mm bore pipe using the same sensor design and data fusion techniques [14]. An integrated instrumentation system, incorporating electrostatic and capacitive sensors and data fusion algorithms, was reported by Zhang et al [15] for the volumetric concentration measurement of biomass/coal/air three-phase flow in a 100 mm bore pneumatic pipe. Zhou and Zhang [16] presented a non-invasive measurement method of visualizing the flow pattern and charge distribution of glass beads and PF under dense-phase flow conditions on 25 mm bore gravityfed and 100 mm bore pneumatic conveying rigs.…”

Section: Introductionmentioning

confidence: 99%

Pulverized coal flow metering on a full-scale power plant using electrostatic sensor arrays

Qian

Huang

et al. 2014

Flow Measurement and Instrumentation

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Concentration measurement of biomass/coal/air three-phase flow by integrating electrostatic and capacitive sensors

Cited by 30 publications

References 14 publications

Simulation Analysis of Capacitance Method in Two-Phase Flow Concentration Measurement by Coupled Fields

Simulation Analysis of Capacitance Method in Two-Phase Flow Concentration Measurement by Coupled Fields

Multi‐scale analysis of acoustic emission signals in dense‐phase pneumatic conveying of pulverized coal at high pressure

Pulverized coal flow metering on a full-scale power plant using electrostatic sensor arrays

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