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The measurement of particle velocity and suspension density in pneumatic coal injection systems

The measurement of particle velocity and suspension density in pneumatic coal injection systems

Woodhead, Stephen Robert (1992) The measurement of particle velocity and suspension density in pneumatic coal injection systems. PhD thesis, University of Greenwich.

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This thesis describes a programme of work which has been undertaken with the objective of obtaining data relating to the performance of on-line mass flow rate meters as applied to pulverised coal injection systems. Such injection systems are utilised widely in power generation, cement and steel manufacture.

A technology review was carried out, incorporating an extensive literature survey. This review precipitated the conclusion that a number of techniques have been proposed, which may be applicable to the measurement under investigation. However, very little experimental verification of sensing systems based on these techniques had been undertaken.

A test facility, suitable for such verification was therefore developed and an extensive programme of tests were carried out, of a sensing system based on an electrostatic technique. The development of a mathematical model of the sensor operation has also been undertaken, in an attempt to explain some of the more unusual aspects of the experimental results.

The overall conclusion is that some aspects of the measurement can be achieved without major difficulties, whilst problems have yet to be resolved in respect of other
aspects of the measurement system. The principle of the measurement system is such that the independent measurement of average particle velocity and suspension density are required in order to measure mass flow rate. The measurement of average particle velocity was shown to be achievable by either of two techniques, whilst the measurement of suspension density proved more problematic.

Recommendations for further work, aimed at addressing these remaining aspects are detailed.

Item Type: Thesis (PhD)
Additional Information: In collaboration with Blue Circle Cement Plc.
Uncontrolled Keywords: electrostatic sensors, conveyor manufacturing processes, automatic control, control theory, coal manufacturing, mass flux,
Subjects: Q Science > QC Physics
T Technology > TN Mining engineering. Metallurgy
Pre-2014 Departments: School of Engineering
Last Modified: 22 Aug 2018 14:34
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None

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