| Title | Experimental and simulation investigation on the characteristics and performance of the spray separation tower for evaporation crystallization of saline wastewater |
|---|---|
| ID_Doc | 64859 |
| Authors | Yu, J; Chen, L; Yan, WD |
| Title | Experimental and simulation investigation on the characteristics and performance of the spray separation tower for evaporation crystallization of saline wastewater |
| Year | 2021 |
| Published | |
| Abstract | Spray separation tower is the most important component in solar air circulation evaporating separation system for saline wastewater treatment. In order to explore the necessary conditions for the separation process and improve the overall system performance, the heat and mass transfer performance and evaporation crystallization characteristics of the tower are investigated through computational fluid dynamics simulation and experiment. The results reveal that the four-stage model has high accuracy in predicting the spray separation process. The air temperature has the greatest influence on the evaporation separation process of the spray separation tower. Sufficient air inlet temperature (t(a,in) > 90 degrees C at 20% concentration) is the basic condition to ensure the curing crystallization of the wastewater droplets. However, the improvement of air temperature is not conducive to the energy utilization ratio (EUR) and eta(Q) of the tower. Therefore, it is necessary to maintain a certain air inlet temperature (at 20% concentration, 105 degrees C > t(a,in) > 90 degrees C) to ensure a high EUR (maintained above 40%, maximum of 43.78%) and eta(Q) (maintained above 70%, maximum of 71.97%). In addition, the increase of the mass concentration of wastewater is beneficial to the spray separation process and the solidification of particles, but it leads to the decrease of the EUR. |
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