Process simulation on atomization and evaporation of desulfurization wastewater and its application

Ye, Xinglian; An, Xizhong; Zhang, Hao; Wang, Shuai; Guo, Bin; Yu, Aibing

doi:10.1016/j.powtec.2021.05.024

Cited by 19 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the problems associated with high investment costs, operation costs, and difficulty in the disposal of crystallized salt in the crystallization process, , studies began focusing on hot flue gas evaporation technology as the mainstream process for zero-discharge technology. In this technology, the bypass flue gas process achieves a temperature generally above 300 °C, which can achieve complete evaporation of FGD wastewater and save valuable power plant water resources . According to Lian et al, a power plant in Henan Province, China, adopted a 9-m-diameter spray drying tower to treat 8 m 3 /h of desulfurization wastewater to ensure that the wastewater was completely evaporated without sticking to the wall, and a flue gas temperature at the outlet of the unit under different unit loads to maintain a temperature of 160 °C (within a temperature range of ±10 °C) was achieved, revealing good operating results.…”

Section: Introductionmentioning

confidence: 99%

Review of Migration, Transformation, and Control of Volatile Components during Desulfurization Wastewater Evaporation: Advances and Perspectives

Chen

Zhan

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Desulfurization wastewater evaporation technology has, over time, been adopted by coal-fired power plants in recent years to achieve zero discharge of wastewater. However, the volatile components of chlorine, trace elements (Hg, As, and Se), and ammonia nitrogen in wastewater are released in gaseous form. It potentially leads to the risk of their cyclic enrichment in wastewater from desulfurization. This review summarizes volatile components' migration and transformation behavior during evaporation. As the evaporation process proceeds, Cl would be released as HCl. Due to the volatility of Hg, As, and Se, the evaporation process would be coupled with the migration and transformation of gaseous components such as Hg 0 , SeO 2 , and As 2 O 5 . The ammonia and ammonium present in the wastewater would release during evaporation, and its release rate depends greatly on the pH value of the wastewater. In addition, the released gaseous and particulate volatile components can further interact with the flue gas components, such as those from thermal decomposition and conversion, adsorption, and condensation on the solid particulate matter from wastewater evaporation. Moreover, several control strategies are proposed in this work to avoid the adverse effects of wastewater evaporation technology. The zero valent iron method offers suitable potential applications with high removal efficiency and the ability to remove multiple pollutants simultaneously. Developing new adsorbents, which may significantly reduce risks associated with the release of volatile components, should also be the focus of future research.

show abstract

Section: Introductionmentioning

confidence: 99%

Review of Migration, Transformation, and Control of Volatile Components during Desulfurization Wastewater Evaporation: Advances and Perspectives

Chen

Zhan

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Besides, some researchers select the saltwater model to represent the FGD wastewater in practical application. Ye et al [7] adopted the salt-containing droplet evaporation model to explore the real wastewater evaporation characteristics, and found that the increase in jet velocity could improve the droplet evaporation rate not only because droplets were more uniformed in distribution, but also the turbulent kinetic energy of the flue gas was enhanced.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on the Influence of FGD Wastewater Atomized Droplet Particles Parameters on Evaporation Performance

Debo¹,

Li²,

Wu³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…As people pay more attention to desulfurization wastewater with zero discharge, researchers have begun to study the drying of wastewater by means of atomization. Ye [18] studied the effects of injection velocity, liquid film angle, flue gas velocity on the evaporation process through numerical simulation. They found that increasing the injection velocity and the liquid film thickness and reducing the flue gas velocity was beneficial to evaporation.…”

Section: Introductionmentioning

confidence: 99%

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

Zhao

Feng

et al. 2022

Water

View full text Add to dashboard Cite

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.

show abstract

Process simulation on atomization and evaporation of desulfurization wastewater and its application

Cited by 19 publications

References 25 publications

Review of Migration, Transformation, and Control of Volatile Components during Desulfurization Wastewater Evaporation: Advances and Perspectives

Review of Migration, Transformation, and Control of Volatile Components during Desulfurization Wastewater Evaporation: Advances and Perspectives

Numerical Simulation on the Influence of FGD Wastewater Atomized Droplet Particles Parameters on Evaporation Performance

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

Contact Info

Product

Resources

About