Co-axial horizontal impinging stream

MOTION OF A SINGLE PARTICLE IN CO-AXIAL HORIZONTAL IMPINGING STREAMS... 

Figure 2.1 Movement of single particle in co-axial horizontal impinging streams.

As an example, let us now examine the specific case of particle motion at 25°C and atmosphere pressure. The related physical properties are dp = 0.001 m, pp = 1000 kg-nf p, = 1.145 kg-in. and pg = 1.798 Pa s. The calculated values for the terminal velocity and the operational condition ranges are given in Table 2.2. An important conclusion that can be drawn from the data listed in the fourth column of Table 2.2 is that the Stokes regime cannot exist in co-axial horizontal impinging streams while other regimes are applicable in this kind of impinging stream. 

To make sampling easier, the open horizontal co-axial two-impinging stream device is employed in the experiments, as shown in Fig. 5.1. 

Wu and Wu [50, 51] studied the residence time distribution of particles in a typical co-axial horizontal gas-solid impinging stream contactor (ISC). The structure of the experimental impinging stream device is shown in Fig. 3.1. The body of the contactor is made of plexiglass. The horizontal cross section of the upper chamber is a square of 0.4x0.4 m, and the bottom is tapered sharply in order to avoid the solid material heaping up. This equipment essentially meets the requirements stated above. 

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