Dynamic control method of particle distribution uniformity in the rolling circulating fluidized bed (RCFB)

Figures & data

Figure 1. Accumulation of particles in the riser.

Figure 2. The dynamic control method of the air distribution plate.

Figure 3. (a) Geometry model of the RCFB. (b) Rolling process of the RCFB.

Table 1. Different Simulation calculation cases.

Riser tilt angle θ/(°)	2, 5, 8, 10, 12, 15
Inclined angle of air distribution plate $\phi$/(°)	−2, −5, 0, 2, 5, 8, 10, 12

Table 2. Setting of simulation parameters.

Parameter name	Parameter setting	Parameter name	Parameter setting
Reynolds number	2.8 × 10^4	Particle diameter	0.4 mm
Turbulence intensity	3%	Particle accumulation mass	40 kg
Air density	1.225 kg m^−3	Air inlet speed	3.5 m/s
Air viscosity	1.79 × 10^−5 kg m^-s	Air two times import speed	10 m/s
Particle density	2500 kg m^−3	Particle accumulation volume	0.0267 m^3
Particle viscosity	1.72 × 10^−5 kg m^−s	Bulk volume fraction	0.6

Figure 4. The compared pressure gradient along with the riser height y′ in the RCFB between the simulation performed by Wang et al., 2020 and the experiment conducted by Zhao et al., 2016 (a) upright (θ = 0°), (b) θ = 15°

Figure 5. Particle distribution in the riser with different inclined angles of air distribution plate.

Figure 6. Standard deviation in the riser changed with different inclined angles of air distribution plate.

Figure 7. Function fitting diagram of air distribution plate inclination angle and riser inclination angle.

Figure 8. Function diagram of riser inclination angle and air distribution plate inclination angle.

Figure 9. Cloud figure of particle distribution in the riser before and after dynamic control.

Figure 10. Particle distribution in the riser before and after dynamic control.

Wang, Z., Zhao, T., Liu, K., & Takei, M. (2020). Clarification of an improved cluster renewal model (ICRM) for heat transfer characteristics in a rolling circulating fluidized bed (RCFB). Advanced Powder Technology, 31(7), 2866–2879. https://doi.org/https://doi.org/10.1016/j.apt.2020.05.015

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Zhao, T., Nakamura, Y., Liu, K., Murata, H., & Takei, M. (2016). The effect of rolling amplitude and period on particle distribution behavior in a rolling circulating fluidized bed. Powder Technology, 294, 484–492. https://doi.org/https://doi.org/10.1016/j.powtec.2016.03.018

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