摘要
当前节能降耗是社会发展的重要原则,结合回收工业余热实现我国北方地区部分城镇冬季供暖,符合我国经济社会发展需求和原则。通常工业余热品味较低,代表性的有加热蒸汽排放的乏汽,工业乏汽特点是流量大、压力低、温度低,工业乏汽的热量回收需要换热面积巨大的换热器。运用软件模拟研究了一定工况条件下压缩乏汽余热回收流程,通过分析流程中物流温度、压缩机功率、换热量和余热回收换热器对数平均传热温差之间的关系,指出增加压缩机加压乏汽可以提高余热回收换热器传热推动力减小余热回收换热器换热面积,同时可略微增加乏汽回收的热量。
At present,energy conservation and consumption reduction are important principles of social development.Combining waste heat from recycling industry to realize winter heating in some cities and towns in northern China is in line with China’s economic and social development needs and principles.Generally,the industrial waste heat taste is low,and the representative steam is exhausted by heating steam.The industrial exhaust steam is characterized by large flow,low pressure and low temperature.The heat recovery of industrial exhaust steam requires a heat exchanger with a large heat exchange area.The software simulation studies the recovery process of compressed steam residual heat under certain working conditions.By analyzing the relationship between the flow temperature,compressor power,heat exchange and the logarithmic mean heat transfer temperature difference of the heat recovery heat exchanger,it is pointed out that the compression is increased.The machine pressurized exhaust steam can improve the heat transfer driving force of the waste heat recovery heat exchanger to reduce the heat exchange area of the waste heat recovery heat exchanger,and can slightly increase the heat recovered by the spent steam.
作者
马倩
杨洁
邰立民
张立明
Ma Qian;Yang Jie;Shao Li-min;Zhang Li-ming
出处
《化工设计通讯》
CAS
2019年第11期224-224,243,共2页
Chemical Engineering Design Communications
关键词
余热回收
换热器
传热推动力
waste heat recovery
heat exchanger
heat transfer driving force
