A waste heat recovery power generation system combined with natural gas liquefaction and CO2 capture

被引：0

作者：

Zhang L. ^{[1
]}

Wang W. ^{[1
]}

Zhang Z. ^{[2
]}

Liu P. ^{[3
]}

Wen J. ^{[4
]}

Dong L. ^{[1
]}

机构：

[1] College of Petroleum Engineering, Liaoning Shihua University, Fushun, 113001, Liaoning

[2] School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing

[3] School of Computer and Communication Engineering, Liaoning Shihua University, Fushun

[4] School of Petroleum Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong

来源：

Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 01期

关键词：

CO[!sub]2[!/sub] capture; Liquefaction; Natural gas; Optimization; Power generation;

D O I：

10.11949/j.issn.0438-1157.20180567

中图分类号：

学科分类号：

摘要：

Aiming at the problem of waste heat recovery and energy utilization, LNG and heavy oil extraction exhaust gas are used as cold source and heat source respectively, and a waste heat recovery and utilization system combined with natural gas liquefaction and exhaust gas power generation and CO2 capture is proposed. The effect of key parameters on thermodynamic performance is evaluated. The results show that increasing the turbine inlet temperature, decreasing of turbine outlet pressure and in the compression ratio, have a positive effect on the organic Rankine cycle and refrigeration cycle. The maximum net output power and waste heat recovery efficiency are 454.9 kW and 34.2%, respectively. For the natural gas liquefaction system, the nonlinear optimization of natural gas liquefaction cycles was calculated by using C++. The total power consumption within the nitrogen expansion refrigeration compressors has been selected as the objective function. The nonlinear constrained optimization problem of the liquefaction process is constructed. The optimal total power consumption of the compressors is 101.54 kW. The gas peak load regulation can be taken by decreasing the natural gas compressor (K110) inlet temperature, nitrogen turbine (T3) outlet pressure and its mass flow rate; the maximum value is 378.8 kg/h. On the contrary, the volume of carbon dioxide captured can be increased by 28.6%. © All Right Reserved.

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页码：261 / 270

页数：9

共 30 条

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