液化天然气深冷-膜蒸馏海水淡化系统集成与分析

doi:10.11949/0438-1157.20201553

摘要/Abstract

摘要：

提出了一种PRICO天然气液化-膜蒸馏（MD）海水淡化系统集成方法，利用PRICO过程压缩机出口的余热驱动MD海水淡化。采用Aspen Plus和GAMS建立了集成系统的数学模型，综合考虑系统的结构、物流物性、设备规模、操作参数等系统设计问题，分析不同设计下系统的投资、能耗、运行费用以及MD单位产水成本。模型应用于一个处理量为1 kmol/s的PRICO天然气液化系统与MD集成的案例研究。计算结果表明，单位产水成本最小时，系统产水成本为1.98 USD/m³，淡水产量为5.78 m³/h，与反渗透等海水淡化技术相比，MD在经济性方面具有较强的竞争力。

关键词: 过程系统, 集成, 液化天然气, 膜蒸馏, 海水淡化

Abstract:

An integrated system of PRICO natural gas liquefaction-membrane distillation (MD) seawater desalination is proposed. The system utilizes the waste heat from compressor outlet of the PRICO process to drive MD seawater desalination. A mathematical model of the integrated system is formulated using Aspen Plus and GAMS. The model simultaneously considers the system structure, streams properties, equipment sizing, operating parameters, and other system design variables. The model is capable of optimizing the system design that achieves the optimal investment costs, energy consumption, operating costs, and MD unit water production costs with different system configurations. A case study of a PRICO process with processing capacity of 1 kmol/s integrated with MD process is investigated. Computational results show that the optimal system design is able to achieve a minimum water production cost of 1.98 USD/m³ with a freshwater production rate of 5.78 m³/h, demonstrating that MD is economically competitive compared with reverse osmosis and other seawater desalination technologies.

Key words: process system, integration, LNG, membrane distillation, seawater desalination

中图分类号:

TQ 028.8

徐健玮, 梁颖宗, 罗向龙, 陈健勇, 杨智, 陈颖. 液化天然气深冷-膜蒸馏海水淡化系统集成与分析[J]. 化工学报, 2021, 72(S1): 437-444.

XU Jianwei, LIANG Yingzong, LUO Xianglong, CHEN Jianyong, YANG Zhi, CHEN Ying. Integration and analysis of PRICO-membrane distillation seawater desalination system[J]. CIESC Journal, 2021, 72(S1): 437-444.

图/表 9

参考文献 30

1	BP. BP Energy Outlook 2017 [EB/OL]. [2020-8-1]. .
2	BP. BP Energy Outlook 2016 [EB/OL]. [2020-8-1]. .
3	He T B, Karimi I A, Ju Y L. Review on the design and optimization of natural gas liquefaction processes for onshore and offshore applications [J]. Chemical Engineering Research and Design, 2018, 132: 89-114.
4	Xu X W, Liu J P, Jiang C S, et al. The correlation between mixed refrigerant composition and ambient conditions in the PRICO LNG process [J]. Applied Energy, 2013, 102: 1127-1136.
5	Aslambakhsh A H, Moosavian M A, Amidpour M, et al. Global cost optimization of a mini-scale liquefied natural gas plant [J]. Energy, 2018, 148: 1191-1200.
6	Alkhudhiri A, Darwish N, Hilal N. Membrane distillation: a comprehensive review [J]. Desalination, 2012, 287: 2-18.
7	Ullah R, Khraisheh M, Esteves R J, et al. Energy efficiency of direct contact membrane distillation [J]. Desalination, 2018, 433: 56-67.
8	Morosuk T, Tesch S, Hiemann A, et al. Evaluation of the PRICO liquefaction process using exergy-based methods [J]. Journal of Natural Gas Science and Engineering, 2015, 27: 23-31.
9	Eykens L, De Sitter K, Dotremont C, et al. How to optimize the membrane properties for membrane distillation: a review [J]. Industrial & Engineering Chemistry Research, 2016, 55(35): 9333-9343.
10	Zhang J R, Meerman H, Benders R, et al. Comprehensive review of current natural gas liquefaction processes on technical and economic performance [J]. Applied Thermal Engineering, 2020, 166: 114736.
11	Price B C, Mortko R A. PRICO—a simple, flexible proven approach to natural gas liquefaction [J]. Gastech, 1996, 96: 3-6.
12	Jensen J B, Skogestad S. Optimal operation of a simple LNG process [J]. IFAC Proceedings Volumes, 2006, 39(2): 241-246.
13	Kamath R S, Biegler L T, Grossmann I E. Modeling multistream heat exchangers with and without phase changes for simultaneous optimization and heat integration [J]. AIChE Journal, 2012, 58(1): 190-204.
14	Millero F J, Poisson A. International one-atmosphere equation of state of seawater [J]. Deep Sea Research Part A. Oceanographic Research Papers, 1981, 28(6): 625-629.
15	杨世铭, 陶文铨. 传热学[M]. 4版. 北京: 高等教育出版社, 2006: 563.
	Yang S M, Tao W Q. Heat Transfer [M]. 4th ed. Beijing: Higher Education Press, 2006: 563.
16	Sharqawy M H, Lienhard J H, Zubair S M. Thermophysical properties of seawater: a review of existing correlations and data [J]. Desalination and Water Treatment, 2010, 16(1/2/3): 354-380.
17	Sharqawy M H. New correlations for seawater and pure water thermal conductivity at different temperatures and salinities [J]. Desalination, 2013, 313: 97-104.
18	Deshmukh A, Boo C, Karanikola V, et al. Membrane distillation at the water-energy nexus: limits, opportunities, and challenges [J]. Energy & Environmental Science, 2018, 11(5): 1177-1196.
19	Qtaishat M, Matsuura T, Kruczek B, et al. Heat and mass transfer analysis in direct contact membrane distillation [J]. Desalination, 2008, 219(1/2/3): 272-292.
20	陈新志, 蔡振云, 钱超, 等. 化工热力学[M]. 4版, 北京: 化学工业出版社, 2019: 213-214.
	Chen X Z, Cai Z Y, Qian C, et al. Chemical Engineering Thermodynamics [M]. 4th ed. Beijing: Chemical Industry Press, 2019: 213-214.
21	Hitsov I, Maere T, De Sitter K, et al. Modelling approaches in membrane distillation: a critical review [J]. Separation and Purification Technology, 2015, 142: 48-64.
22	王鹏, 杨茉, 王治云, 等. 各种截面形状通道内对流换热的比较与修正的计算公式[C]//中国工程热物理学会传热传质学术年会. 2012.
	Wang P, Yang M, Wang Z Y,et al. Comparison of convective heat transfer in various cross section shape channels and modified calculation formula [C]// Annual Conference of Chinese Society of Engineering Thermophysics on Heat and Mass Transfer. 2012.
23	Bahmanyar A, Asghari M, Khoobi N. Numerical simulation and theoretical study on simultaneously effects of operating parameters in direct contact membrane distillation [J]. Chemical Engineering and Processing: Process Intensification, 2012, 61: 42-50.
24	Hitsov I, Sitter K D, Dotremont C, et al. Economic modelling and model-based process optimization of membrane distillation [J]. Desalination, 2018, 436: 125-143.
25	Elsayed N A, Barrufet M A, El-Halwagi M M. Integration of thermal membrane distillation networks with processing facilities [J]. Industrial & Engineering Chemistry Research, 2014, 53(13): 5284-5298.
26	Peters M S. Plant Design and Economics for Chemical Engineers [M]. McGraw-Hill, 1958.
27	Caputo A C, Pelagagge P M, Salini P. Manufacturing cost model for heat exchangers optimization [J]. Applied Thermal Engineering, 2016, 94: 513-533.
28	Phattaranawik J, Jiraratananon R, Fane A G. Heat transport and membrane distillation coefficients in direct contact membrane distillation [J]. Journal of Membrane Science, 2003, 212(1/2): 177-193.
29	王云山. 膜蒸馏海水淡化特性分析及其与吸收式制冷机复合系统的研究[D]. 济南: 山东大学, 2019.
	Wang Y S. MD desalination characteristics analysis and study of its combination system with absorption chiller [D]. Jinan: Shandong University, 2019.
30	Voutchkov N. Desalination Project Cost Estimating and Management [M]. CRC Press, 2018.

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比例	75%	25%

设计参数	数值
天然气处理量	1 kmol/s
天然气压力	5.5 MPa
气态天然气温度	25℃
液化天然气温度	-155℃
制冷剂流量	2.4 kmol/s
冷凝器出口温度	25℃
节流阀入口温度	-155℃
节流阀出口温度	-167℃
冷海水温度	20℃
淡水产品温度	25℃
热海水温度	70℃
冷淡水温度	30℃
膜热侧流速	2 m/s
膜冷侧流速	2 m/s
最小换热温差	5℃

设计参数	数值
天然气处理量	1 kmol/s
天然气压力	5.5 MPa
气态天然气温度	25℃
液化天然气温度	-155℃
制冷剂流量	2.4 kmol/s
冷凝器出口温度	25℃
节流阀入口温度	-155℃
节流阀出口温度	-167℃
冷海水温度	20℃
淡水产品温度	25℃
热海水温度	70℃
冷淡水温度	30℃
膜热侧流速	2 m/s
膜冷侧流速	2 m/s
最小换热温差	5℃

物质	摩尔分数
物质	N₂	CH₄	C₂H₄	C₃H₈	C₄H₁₀-1
天然气	2.8%	89.8%	5.5%	1.88%	0.1%
混合制冷剂	12.53%	19.09%	32.96%	—	35.42%

物质	摩尔分数
物质	N₂	CH₄	C₂H₄	C₃H₈	C₄H₁₀-1
天然气	2.8%	89.8%	5.5%	1.88%	0.1%
混合制冷剂	12.53%	19.09%	32.96%	—	35.42%

项目	数值
电价P_e/（USD/(kW·h)）	0.13
清洁周期T_cl/d	5
清洁费用C_cl/( USD /次)	1.17
保养费C_m/( USD /a)	0.025(c_hx+c_pump)
保险费C_i/( USD /a)	0.01c_ca