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Power technology Isokinetic sampling

Power technology Isokinetic sampling
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Power technology Isokinetic sampling - 2

The method enables the isolation of gas-solid flow from the main stream without disturbing the flow around the probe by ensuring isokinetism (the extraction velocity is equal to the velocity of the suspension at the measurement point). Probes used by Rhodes [6] and Aiguillon and al. [5], drawn in figures 1 and 2, are unable to obtain isokinetism. Velocity field characterization is required before concentration measurements. Figure 2 Figure 1 : Rhodes probes [6]. : Aiguillon and al. Probes [5]. 2.1. Equipment. > The probe is composed of a tip, placed in front of the flow, a filter element...

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Power technology Isokinetic sampling - 3

valves gas flow ratebalance of the probe liquid jet vaccum pump φ 5 mm gas+solidsolidgas compressed air microcyclone φ 36 mmnozzle probe tip wall sample container g as-solid flow Figure 3 : Probe design. 2.2. Operating mode. The probe tip has two pressure intakes (P1 and P2). The geometry of the tip used is described in figure 4. > toric join 7mm 12mm P1P2 Figure 4: Probe tip design. Pressure P1 represents the static pressure of the flow outside the probe, and P2 that of the inside flow. As the total pressure is the same for both flows, when static pressures P1 and P2 are equal, velocities...

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Power technology Isokinetic sampling - 5

y clone p ressure dro p fan fan filter coffe r > g asfinescoarses feed torch c coffe r b yp ass belt wei g he r wei g hted ho pp e r >

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Power technology Isokinetic sampling - 11

C local solids concentration (kg/kg), C > cyclone inlet mean concentration (kg/kg), D cyclone diameter (mm), h cyclone inlet vertical position (mm), H inlet height (mm), P > 1 external flow static pressure, P > 2 internal flow static pressure, r radial position (mm), V > t tangential velocity (m/s), V > t max (without material) maximum tangential velocity in pure air. > [1] J.J.Nieuwland, R.Meijer, J.A.M.Kuipers and W.P.M.Van Swaaij, Powder Technology, 87 (1996). [2] U.Mann and E.J.Crosby, Ind. Eng. Chem. Proc., 16, (1977). [3] E.U.Hartge, Y.Li and J.Westher, Proc. 1 > st Int. Conf....

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Power technology Isokinetic sampling 11Pages

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Power technology Isokinetic sampling
11Pages