Abstract
Spray scrubbing is effective to remove hydrophilic particles from Urea Prilling Tower. Simulation of dust removal based on particle capture mechanism was investigated for spray scrubbing process. Numerical simulation and experiments were conducted to study flow characteristics and key factors such as gas velocity, spraying density and particle size were analyzed. The results show that: 1) air flow near wall has maximum velocity with wall flow, which leads to dust escape. 2) particle removal efficiency increases with the increase of spraying density, but the increase rate gradually decreases. Dust removal efficiency does not always decrease with the increase of gas velocity. For example, when spraying density is 2 m∙h-1 and gas velocity is 2.5 m∙s-1, removal efficiency increases. 3) Removal efficiency of particles > 10μm can reach 95%. However, the removal of particles < 10 μm is difficult due to the random movement of fine particles. 4) gas velocity has few effects on particle removal efficiency. Therefore, it is more effective to improve particle removal efficiency by increasing spraying density.
| Translated title of the contribution | Hydrodynamic Characteristics and Particle Removal Efficiency Off-gas from Urea Prilling Tower in Spraying Scrubber |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 785-793 |
| Number of pages | 9 |
| Journal | Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities |
| Volume | 32 |
| Issue number | 4 |
| DOIs | |
| State | Published - Aug 2018 |