The design of cyclonic pre-heaters in suspension cement kilns

Figures & data

Figure 1 Photograph of a cyclonic pre-heater.

Figure 2 Ratio of the pressure drop (ΔP) at a given C _s and the virgin pressure drop (ΔP ₀) at C _s = 0 for different values of v _c (m/s).

Figure 3 Schematics of the experimental set-up: (1) riser, (2) cyclone, (3) downcomer/L-valve, (4) compressed air, (5) cyclone outlet to the bag filter, (6) γ-ray camera and (7) tracer.

Figure 4 (A) Typical three-dimensional analysis (Y–Z and Z–X axes) of a stable particle trajectory at v _c = 1.75 m/s and C _s = 6.5 kg/kg. (B) Particle track (Y–X axes) in the cyclone, operating at v _c = 1.05 m/s and (a) C _s < 1 and (b) C _s = 8.3 kg/kg.