Exergy Efficiency Calculation and Parameter Optimization of the Sintering Waste Heat Recovery System

Abstract

Abstract:

To solve the problems of low-utilization rate of waste heat and production instability in sintering waste heat recovery, the sintering waste heat recovery system of a steel plant was studied by adopting exergy analysis method, the exergy efficiency model was established for the operational efficiency evaluation system, and the exergy efficiency of the system under different operating conditions were analyzed, based on which the exergy efficiency optimization model was established and solved by particle swarm algorithm. The set value of steam conditions was dynamically adjuseted according to the waste heat resources in different entrances, thus increasing the system adaptability to changing environmental conditions. Simulation results based on industrial data show that the dynamic optimization method can improve the exergy efficiency of sintering waste heat recovery system by 4% to 11%.

Key words: waste heat recovery, exergy efficiency, steam parameters, varying duty, dynamic optimization

CLC Number:

TK 11
TP 29

CAO Weihua1,2,CAI Yiqing2,YUAN Yan1,2,WU Min1,2. Exergy Efficiency Calculation and Parameter Optimization of the Sintering Waste Heat Recovery System[J]. Journal of Shanghai Jiaotong University, 2014, 48(07): 1046-1052.

References

［1］陈春霞. 钢铁生产过程余热资源的回收与利用［D］. 沈阳: 东北大学, 2008.

［2］蔡九菊, 董辉, 杜涛, 等. 烧结过程余热资源分级回收与梯级利用研究［J］. 钢铁, 2011, 46(4): 8892.

CAI Jiuju, DONG Hui, DU Tao, et al. Study on grade recovery and cascade utilization of waste heat from sinteringcooling process［J］. Iron and Steel, 2011, 46(4): 8892.

［3］董辉, 赵勇, 蔡九菊, 等. 烧结冷却系统的漏风问题［J］. 钢铁, 2012, 47(1): 9599.

DONG Hui, ZHAO Yong, CAI Jiuju, et al. Leakage of sinteringcooling system［J］. Iron and Steel, 2012, 47(1): 9599.

［4］赵斌, 徐鸿, 路晓雯, 等. 烧结余热发电系统的热力学分析和系统优化［J］. 华北电力大学学报, 2010, 37(3): 4348.

ZHAO Bin, XU Hong, LU Xiaowen, et al. Thermodynamic analysis and the system opimizing for sintering waste heat recovery and power generation［J］. Journal of North China Electric Power University, 2010, 37(3): 4348.

［5］路晓雯. 烧结余热发电系统分析及蒸汽参数优化［D］. 唐山: 河北理工大学, 2010.

［6］Sylvain Q L, Richard A, Andreas G. Dynamic modeling and optimal control strategy of waste heat recovery Organic Rankine Cycles［J］. Applied Energy, 2011, 88(6): 21832190.

［7］Emanuele M, Edoardo A, Stefano C. Numerical optimization of heat recovery steam cycles: Mathematical model, twostage algorithm and applications［J］. Computers and Chemical Engineering, 2011, 35(12): 27992832.

［8］Juan I M, Sergio F M, Nicol J S. Optimal synthesis and design of Heat Recovery Steam Generation (HRSG) via mathematical programming［J］. Energy, 2011, 36(1): 475485.

［9］Costa A N, Vinicius S N M, Manuel E C. Maximum profit cogeneration plantMPCP: System modeling, optimization problem formulation, and solution［J］. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2011, 33(1): 5866.

［10］焦树建. 常规的燃气蒸汽联合循环热效率的关系式［J］. 燃气轮机技术, 1991, 4(3): 111.

JIAO Sujian. Conventional gassteam combined cycle thermal efficiency of the relationship［J］. Gas Turbine Technology, 1991, 4(3): 111.

［11］李维特, 黄保海. 汽轮机变工况热力计算［M］. 北京: 中国电力出版社, 2001: 2728.

［12］熊永华, 姜云涛, 吴敏, 等. 基于产热量优化的烧结余热回收操作参数设定［J］. 上海交通大学学报, 2011, 45(8): 11191124.

XIONG Yonghua, JIANG Yuntao, WU Min, et al. Operating parameters setting method of sintering waste heat recovery process based on heat production optimization［J］. Journal of Shanghai Jiaotong University, 2011,45(8): 11191124.

[1]	LIN Jiayu, HAN Juntao, WANG Yongzhen, HAN Kai, HAN Yibo, LI Jian. Capacity Planning and Operational Optimization for Low-Carbon Data Center Integrated Energy System Considering Exergy Efficiency [J]. Journal of Shanghai Jiao Tong University, 2025, 59(9): 1327-1337.
[2]	XIAO Yinjing, ZHANG Di, WEI Juan, GE Rui, CHEN Dawei, YANG Guixing, YE Zhiliang. Dynamic Optimization of Carbon Reduction Pathways in Coastal Metropolises Considering Hidden Influence of Decarbonization on Energy Demand [J]. Journal of Shanghai Jiao Tong University, 2024, 58(5): 600-609.
[3]	CHEN Qiming, HE Gaolin. Design Optimization of Waste Heat Recovery Unit for “Hai Yang Shi You 123” FPSO [J]. Ocean Engineering Equipment and Technology, 2024, 11(2): 24-28.
[4]	ZHANG Ke, WU Yadong. Blade Optimization Design for Expanding Stable Operating Range of High Bypass Ratio Fan [J]. Journal of Shanghai Jiaotong University, 2020, 54(10): 1024-1034.
[5]	ZHANG Yangang，MAO Huping，SU Tiexiong，DONG Xiaorui，WANG Ying，WANG Jun. Method of Equivalent Static Loads Based on Energy Principle and Its Application in Dynamic Optimization Design of Diesel Engine Piston [J]. Journal of Shanghai Jiaotong University, 2015, 49(09): 1293-1299.
[6]	LI Kebai. Dynamic Optimization and Simulation of Urban Domestic Water Based on Logistic and C-D Function [J]. Journal of Shanghai Jiaotong University, 2015, 49(02): 178-183.
[7]	ZHOU Chen,WANG Zhijin,ZHI Jiaoyang. Aerodynamic Optimization Design of Adaptive Airfoil Leading Edge Based on Isight [J]. Journal of Shanghai Jiaotong University, 2014, 48(08): 1122-1126.
[8]	Lv Lin-Hua , YANG De-Qing. Study on Vibration Reduction Design of Steel-Composite Materials Hybrid Mounting for Ships [J]. Journal of Shanghai Jiaotong University, 2012, 46(08): 1196-1202.
[9]	WANG Zhi-Qiang, SHAO Zhi-Jiang, WAN Jiao-Na, FANG Xue-Yi. A Simultaneous Strategy Based on Radial Basis Function for Dynamic Optimization [J]. Journal of Shanghai Jiaotong University, 2011, 45(08): 1221-1225.
[10]	XIONG Yong-Hua, JIANG Yun-Tao, WU Min, LAI Xu-Zhi. Operating Parameters Setting Method of Sintering Waste Heat Recovery Process Based on Heat Production Optimization [J]. Journal of Shanghai Jiaotong University, 2011, 45(08): 1119-1124.