• DOI:10.2166/wst.2014.359
• Corpus ID: 24586789

Numerical simulation and field test study of desulfurization wastewater evaporation treatment through flue gas.

@article{Deng2014NumericalSA,
  title={Numerical simulation and field test study of desulfurization wastewater evaporation treatment through flue gas.},
  author={Jia-jia Deng and Liang-ming Pan and Deqi Chen and Yu-Quan Dong and Chenghong Wang and Hang Liu and Mei-qiang Kang},
  journal={Water science and technology : a journal of the International Association on Water Pollution Research},
  year={2014},
  volume={70 7},
  pages={
          1285-91
        }
}

• Jia-jia Deng, L. Pan, +4 authors Mei-qiang Kang
• Published 1 October 2014
• Physics
• Water science and technology : a journal of the International Association on Water Pollution Research

Aimed at cost saving and pollution reduction, a novel desulfurization wastewater evaporation treatment system (DWETS) for handling wet flue gas desulfurization (WFGD) wastewater of a coal-fired power plant was studied. The system's advantages include simple process, and less investment and space. The feasibility of this system has been proven and the appropriate position and number of nozzles, the spray droplet size and flue gas temperature limitation have been obtained by computational fluid dynamics (CFD) simulation. The simulation results show that a longer duct, smaller diameter and higher flue gas temperature could help to increase the evaporation rate. The optimal DWETS design of Shangdu plant is 100 μm droplet sprayed by two nozzles located at the long duct when the flue gas temperature is 130 °C. Field tests were carried out based on the simulation results. The effects of running DWETS on the downstream devices have been studied. The results show that DWETS has a positive impact on ash removal efficiency and does not have any negative impact on the electrostatic precipitator (ESP), flue gas heat exchanger and WFGD. The pH values of the slurry of WFGD slightly increase when the DWETS is running. The simulation and field test of the DWETS show that it is a feasible future technology for desulfurization wastewater treatment.