Time-varying analysis of feasible region and full-cycle operating optimization in multi-effect distillation seawater desalination system

被引：0
|
作者：
Chen C. [1 ]
Luo X. [1 ]
Sun L. [1 ]
机构：
[1] Department of Automation, China University of Petroleum, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 11期
关键词：
Feasible region; Full-cycle optimization; Multi-effect distillation; Process system engineering; Seawater desalination; Slow time-varying;
D O I：
10.11949/0438-1157.20210787
中图分类号：
学科分类号：
摘要：
Excessive energy consumption restricts the large-scale application of multi-effect distillation (MED) seawater desalination technology. Although steady-state operation optimization can effectively reduce the short-term steam consumption rate of the MED system, the accumulation of fouling caused the system to increase steam consumption and reduce plant production during long-term operation. For this reason, the feasible region model of operating conditions in the MED system with thermal vapor compressor (MED-TVC) is established, which relates the location of operating points to the operating benefits. The time-varying analysis of feasible region shows that the operating point crossing the feasible region is the reason for the system performance degradation. Finally a full-cycle operating optimization method with time-varying constraints is proposed, which adjusts the operating conditions of the MED-TVC system in the full cycle to obtain the lowest steam consumption in the full cycle and uses the time-varying feasible region constraints to ensure that the optimization results meet the fresh water production requirements. The results show that the full-cycle operating optimization with time-varying constraints can effectively reduce the total motive steam consumption of the MED-TVC system while maintaining the designed fresh water output. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：5686 / 5695
页数：9
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