摘要
为了处理煤化工过程中产生的有害副产杂醇并回收热能,本文设计了一台以杂醇为燃料的热水锅炉,并在锅炉尾部加装了一种新型吸收-压缩复合热泵来回收烟气余热,通过Aspen Plus软件对热泵回收烟气余热流程进行模拟。结果表明杂醇烟气蕴含丰富潜热,采用该新型热泵能实现余热有效回收,额定工况下能使锅炉热效率提高11.01%。进一步研究了压缩机压比、回水温度和锅炉负荷对热泵性能的影响,并提出分别基于节能和碳减排效果的热泵性能系数COP_(a)和COP_(e)来全面分析热泵的运行性能。结果发现在压比为9.6时热泵COP_(a)和COP_(e)最高,且在压比小于9.6时,热泵性能会受回水温度升高的影响较大。随着锅炉负荷的增大,热泵系统的COP_(a)和COP_(e)先增大后减小。本文研究可为高水分烟气余热的深度回收和新型复合热泵的应用提供一些理论依据。
In this study,a fusel fired hot water boiler was designed to process this poisonous by-product of coal chemical industry.Additionally,the boiler employs a novel hybrid absorption-compression heat pump to recover the waste heat from flue gas.The heat pump's performance for waste heat recover is simulated by using Aspen Plus software.The findings reveal that the flue gas from fusel combustion contains a significant amount of latent heat.The newly designed heat pump effectively recovers waste heat,resulting in an 11.01% enhancement in the boiler thermal efficiency under rated working conditions.Furthermore,this study conducted an in-depth exploration of how the heat pump's performance is influenced by the compressor pressure ratio,return water temperature,and boiler load.In addition,two performance coefficients,which is respectively based on the principles of energy conservation(COP_(a))and carbon emission reduction(COP_(e)),were introduced to provide a comprehensive analysis of the heat pump's operational efficiency.The results indicated that the heat pump achieves its highest COP_(a) and COP_(e) values at a pressure ratio of 9.6.The heat pump's performance is more sensitive to return water temperature when the pressure ratio falls below 9.6.An increase in boiler load leads to an initial rise and subsequent decline in the COP_(a) and COP_(e) of the heat pump.This paper contributes a theoretical foundation for the comprehensive recovery of waste heat from high-moisture flue gas and the utilization of an innovative composite heat pump.
作者
徐琼
杜勇博
张井坤
杨家辉
宗思雨
吕强
车得福
XU Qiong;DU Yong-bo;ZHANG Jing-kun;YANG Jia-hui;ZONG Si-yu;LV Qiang;CHE De-fu(State Key Laboratory of Multiphase Flow in Power Engineering,School of Energy and Power Engineering,Xi'an Jiaotong University,Xi’an 710000,China)
出处
《节能技术》
CAS
2024年第2期99-105,共7页
Energy Conservation Technology
基金
陕西省重点研发计划(2023YBGY287)。
关键词
煤化工杂醇
余热回收
杂醇锅炉
吸收-压缩复合热泵
COP
coal chemical fusel
waste heat recovery
fusel boiler
an absorption-compression heat pump
COP
