Momentum probe and sampling probe for measurement of particle flow properties in CFB boilers

• With the aim of making local particle flow structure studies in commercial scalecirculating fluidized-bed (CFB) boilers, a momentum probe and a non-isokinetic particlesampling probe have been designed to measure local momentum flux of gas-solids flow andparticle flux. The time-averaged, local particle velocity and concentration are deduced from themeasurement results of these two probes. The two probes were calibrated and validated in situin a CFB boiler furnace. In order to better understand the principle of the momentum probeand to ensure reliable measurements, a theoretical model is established by focusing on theparticle deceleration movement inside the probe tip. This model is able to predict the relationshipbetween the gas-solids momentum flux and the impact pressure as obtained from thecalibration.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

Nyckelord

momentum probe

particle flux probe

gas solids two-phase flow.

Circulating fluidized-bed boilers

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art (ämneskategori)

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