Matter-energy-water coupling mechanism and optimization for zero discharge of desulfurization wastewater from coal-fired units

被引：0
作者：
Chen C. [1 ]
Chen X. [2 ]
Xu F. [3 ]
Wu B. [1 ]
Li Y. [2 ]
Lu G. [2 ]
机构：
[1] China Energy Construction Group Jiangsu Electric Power Design Institute Co., Ltd., Nanjing
[2] School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing
[3] China Energy Construction Group Anhui Electric Power Design Institute Co., Ltd., Hefei
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 11期
关键词：
Absorption heat pump; Desulfurization wastewater; Material-water-energy coupling; Multi-effect distillation; Zero discharge;
D O I：
10.11949/0438-1157.20210694
中图分类号：
学科分类号：
摘要：
The waste water discharged from wet desulfurization is one of the most difficult terminal waste water in the waste water of coal-fired units. Thermal curing is the inevitable way to achieve zero discharge of desulfurization wastewater. By constructing a virtual simulation model of the whole coal-fired unit plant-scale thermal system, the advantages and disadvantages of the three mainstream different FGD process routes are compared and analyzed from the perspectives of energy flow, material flow, water balance, and their mutual influence mechanisms. On this basis, a new desulfurization process with heat pump and multi-effects distill is proposed, which requires the smallest amount of high-temperature flue gas, only 1/5 of the bypass direct injection type, and 1/3 of the current mainstream concentration and drying scheme. The new process significantly reduces the consumption of high-temperature flue gas while recovering water and increasing the host's safety. The related research can provide new solution ideas for eliminating desulfurization wastewater from coal-fired units and deep water-saving and provide quantitative analysis and optimization methods. © 2021, Editorial Board of CIESC Journal. All right reserved.
引用
收藏
页码：5800 / 5809
页数：9
相关论文
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