Energy, exergy, economic and environmental comprehensive analysis and multi-objective optimization of a sustainable zero liquid discharge integrated process for fixed-bed coal gasification wastewater

doi:10.1016/j.cjche.2022.10.012

中国化学工程学报 ›› 2023, Vol. 58 ›› Issue (6): 341-354.DOI: 10.1016/j.cjche.2022.10.012

• Full Length Article • 上一篇下一篇

Energy, exergy, economic and environmental comprehensive analysis and multi-objective optimization of a sustainable zero liquid discharge integrated process for fixed-bed coal gasification wastewater

Yanli Zhang¹, Zhengkun Hou¹, Dong Yao¹, Xiaomin Qiu¹, Hongru Zhang¹, Peizhe Cui¹, Yinglong Wang¹, Jun Gao², Zhaoyou Zhu¹, Limei Zhong¹

1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China

收稿日期:2022-07-22 修回日期:2022-09-30 出版日期:2023-06-28 发布日期:2023-08-31
通讯作者: Peizhe Cui,E-mail:cpzmagic@qust.edu.cn;Yinglong Wang,E-mail:wangyinglong@qust.edu.cn
基金资助:
This work is supported by the National Natural Science Foundation of China (22078166, 22178188).

Energy, exergy, economic and environmental comprehensive analysis and multi-objective optimization of a sustainable zero liquid discharge integrated process for fixed-bed coal gasification wastewater

Yanli Zhang¹, Zhengkun Hou¹, Dong Yao¹, Xiaomin Qiu¹, Hongru Zhang¹, Peizhe Cui¹, Yinglong Wang¹, Jun Gao², Zhaoyou Zhu¹, Limei Zhong¹

1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Received:2022-07-22 Revised:2022-09-30 Online:2023-06-28 Published:2023-08-31
Contact: Peizhe Cui,E-mail:cpzmagic@qust.edu.cn;Yinglong Wang,E-mail:wangyinglong@qust.edu.cn
Supported by:
This work is supported by the National Natural Science Foundation of China (22078166, 22178188).

摘要/Abstract

摘要： For a long time, China's regional water resource imbalance has restricted the development of coal chemical industry, and it is imperative to achieve zero liquid discharge (ZLD). Therefore, the game relationship between technical indicators, costs and emissions in ZLD process of fixed-bed coal gasification wastewater treatment process should be explored in detail. According to the accurate model, the simulation for ZLD of fixed-bed coal gasification wastewater treatment process is established, and this process is assessed from the perspective of thermodynamics, economy, and environment. The total energy consumption of ZLD process before optimization is 4.032×10⁸ W. The results of exergy analysis show exergy destruction of ZLD process is 94.55%. For economic and environmental results, the total annual cost is 1.892×10⁷ USD·a^-1 and the total environmental impact is 4.782×10^-8. The total energy consumption of the optimal six-step ZLD process based on multi-objective optimization is 4.028×10⁸ W. The CO₂ content in the treated wastewater is 0.1%. This study will have an important role in promoting the establishment of the ZLD process for coal chemistry industry.

关键词: Waste water, Case study, Energy, Exergy, Economy, Environment

Abstract: For a long time, China's regional water resource imbalance has restricted the development of coal chemical industry, and it is imperative to achieve zero liquid discharge (ZLD). Therefore, the game relationship between technical indicators, costs and emissions in ZLD process of fixed-bed coal gasification wastewater treatment process should be explored in detail. According to the accurate model, the simulation for ZLD of fixed-bed coal gasification wastewater treatment process is established, and this process is assessed from the perspective of thermodynamics, economy, and environment. The total energy consumption of ZLD process before optimization is 4.032×10⁸ W. The results of exergy analysis show exergy destruction of ZLD process is 94.55%. For economic and environmental results, the total annual cost is 1.892×10⁷ USD·a^-1 and the total environmental impact is 4.782×10^-8. The total energy consumption of the optimal six-step ZLD process based on multi-objective optimization is 4.028×10⁸ W. The CO₂ content in the treated wastewater is 0.1%. This study will have an important role in promoting the establishment of the ZLD process for coal chemistry industry.

Key words: Waste water, Case study, Energy, Exergy, Economy, Environment

Yanli Zhang, Zhengkun Hou, Dong Yao, Xiaomin Qiu, Hongru Zhang, Peizhe Cui, Yinglong Wang, Jun Gao, Zhaoyou Zhu, Limei Zhong. Energy, exergy, economic and environmental comprehensive analysis and multi-objective optimization of a sustainable zero liquid discharge integrated process for fixed-bed coal gasification wastewater[J]. 中国化学工程学报, 2023, 58(6): 341-354.

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Energy, exergy, economic and environmental comprehensive analysis and multi-objective optimization of a sustainable zero liquid discharge integrated process for fixed-bed coal gasification wastewater

Energy, exergy, economic and environmental comprehensive analysis and multi-objective optimization of a sustainable zero liquid discharge integrated process for fixed-bed coal gasification wastewater

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