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Article

Economic Analysis of Atomization Drying of Concentrated Solution Based on Zero Discharge of Desulphurization Wastewater

1
China Southern Power Grid Technology Co., Ltd., Guangzhou 510080, China
2
School of Electric Power, South China University of Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
Academic Editor: Alexandre T. Paulino
Water 2022, 14(2), 148; https://doi.org/10.3390/w14020148
Received: 1 December 2021 / Revised: 23 December 2021 / Accepted: 29 December 2021 / Published: 7 January 2022
(This article belongs to the Section Wastewater Treatment and Reuse)
With the improvement of environmental protection requirements, more and more attention has been given to desulphurization wastewater with zero discharge in coal power plants. Atomization drying is part of the main zero discharge technologies at present. Economic analysis of the atomization drying of desulphurization wastewater is beneficial to the formulation of an appropriate operation scheme and to the reduction of operation costs. The economic analysis and sensitivity analysis of different operating conditions such as unit load, the handling capacity of concentrates, and the temperature of the extracted flue gas in the atomization drying process of concentrated desulfurized wastewater were carried out in this paper. The main cost of the drying process came from the influence of flue gas extraction on the overall heat transfer in the boiler, resulting in the decrease in power generation revenue, which can reach more than 80%. The operating cost of auxiliary machinery was relatively low. The cost of treatment for per ton of concentrates increased first and then decreased with the increase in temperature of the extracted flue gas, and it decreased with the increase in the handling capacity of the concentrates. The effect of a unit load on the treatment cost was also related to the temperature of the extracted flue gas, and the optimal flue gas temperature increase to higher temperatures as the unit load decreased. The minimum treatment costs per ton of concentrate ranged from CNY 143.54/t to CNY 158.77/t under different unit loads. Sensitivity analysis showed that the temperature of the extracted flue gas had the greatest impact on treatment cost, and its sensitivity coefficient was 0.0834. The ways in which to improve economic benefits were discussed. View Full-Text
Keywords: desulphurization wastewater; atomization drying; economic analysis desulphurization wastewater; atomization drying; economic analysis
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MDPI and ACS Style

Zhao, N.; Feng, Y.; Li, D.; Chen, L. Economic Analysis of Atomization Drying of Concentrated Solution Based on Zero Discharge of Desulphurization Wastewater. Water 2022, 14, 148. https://doi.org/10.3390/w14020148

AMA Style

Zhao N, Feng Y, Li D, Chen L. Economic Analysis of Atomization Drying of Concentrated Solution Based on Zero Discharge of Desulphurization Wastewater. Water. 2022; 14(2):148. https://doi.org/10.3390/w14020148

Chicago/Turabian Style

Zhao, Ning, Yongxin Feng, Debo Li, and Limei Chen. 2022. "Economic Analysis of Atomization Drying of Concentrated Solution Based on Zero Discharge of Desulphurization Wastewater" Water 14, no. 2: 148. https://doi.org/10.3390/w14020148

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