Numerical simulation of WFGD wastewater with atomizing and crystallization treatment

Release time:2024-12-23 Hits:

Key Words:Atomizing;crystallization;numerical simulation;wastewater wet flue gas desulfurization

Abstract:Wet flue gas desulfurization (WFGD) wastewater treatments used by most coal-fired power plants have difficulty in realizing completely zero emi. An atomizing and crystallization treatment of desulfurization wastewater using high-temperature gas from SCR (selective catalytic reduction) denitrification reactors was proposed. Using ANSYS software, 3D modeling of a crystallization tower and a numerical simulation of evaporation were conducted, and the crystallization process of wastewater droplets was studied. Based on the results of the simulation, effects of four main factors on evaporation efficiency were analyzed. The results indicate that droplet group with the same initial diameter of 10 mu m can evaporate entirely within a time of 0.6 s and a height of 2.4 m when the mass flow rate of 620 K flue gas increases to 2.1 kg/s. In a practical process, fluctuations in the temperature and humidity should be avoided to guarantee complete evaporation. The results provide data support for technology design of crystallization towers applied in power plants.

Volume:42

Issue:10

Translation or Not:no