Enhanced pulverized coal mass flow measurement

Concentration measurement with thermal probe for pulverized coal in the pneumatic pipeline of power plant

“…(17) is comparatively appropriate to correlate the experimental data in comparison with Eqs. (15) and (16). Over the data range quoted, Eq.…”

“…The capacitive method [3][4][5][6], electrostatic method [7], electromagnetic method [8], optical method [9], acoustic method [10,11] and radiometric method [6,12] are volume-dependent ones. The Coriolis method [13], pressure drop method [6,14], gravimetric method [15,16], and thermal method [17][18][19] belong to the mass-dependent category.…”

“…Coriolis flow meters are suitable for the mass flow rate measurement of many types of single and multiphase flows, but they are still of limited use in dilute phase conveying applications [1]. The method based on vessel weight variation was found to be suitable to dense flow [16]. At present, the concentration measurement of pulverized coal in the pneumatic situation is still a challenging issue for multiphase flow metrology.…”

Measurement of the Pulverized Coal Concentration by Measuring the Time Delay of Ultrasonic with Digital Correlation Method

“…Since the pulverized coal in powder feeding tube is a gas-solid flow, it is difficult to measure online. The current methods are generally heat balance method, the heat transfer method, laser method, capacitance, ultrasonic method and so on [2][3][4][5][6][7]. And the ultrasonic one uses the value of threshold to measure the time delay of ultrasonic to calculate the pulverized coal concentration in the most situations, whose anti-jamming capacity, however, is comparatively poor.…”