Particle concentration in internally circulating and multistage spouted desulfurization tower

To increase particle concentration and reinforce internal circulation in circulating fluidized bed-flue gas desulfurizer (CFB-FGD), an internally circulating and multistage spouted tower was presented and an experimental installation was established. By changing inlet gas velocity, particle concentration and distance from tower-top, the particle concentration and resistance force were predicted by using the collapse bed method. An internal concentration scale was obtained. A numerical study was conducted to simulate particle flow. Predicted particle concentration, resistance force and other parameters agreed with experimental data. The conclusions are good reference for engineering application.