大型火力发电厂低温余热利用的研究与应用  

Study on Utilization of Low Temperature Waste Heat of Big Coal-fired Power Plants

作　　者：胡松如 吴斌[2] 韩峰[3] 王友才[3] 

机构地区：[1]浙江省能源集团有限公司 [2]浙江浙能镇海发电有限责任公司 [3]清华大学热能工程系

出　　处：《电站系统工程》2014年第1期1-3,6,共4页Power System Engineering

基　　金：浙江省科学技术厅重大科技专项计划(2012C01029-1)

摘　　要：大型火力发电厂燃煤锅炉的排烟温度在110~180℃，既浪费大量能源，又造成环境污染，利用低温省煤器对锅炉尾部烟气余热进行回收与利用，具有重要的经济和环境价值。结合镇海电厂670t／h锅炉进行分析，选用_两级的低温省煤器布置方案，吸收烟气中的热量用来加热冷凝水，实现能源的梯级利用，可以显著减少电厂煤耗，降低电厂水耗，增加发电量，经济和社会效益显著。The exhaust gas temperature of big coal-fired power plants＇ boilers is 110-180℃, which is a huge waste of energy and causes environmental pollution. Therefore the way of utilizing waste heat of flue gas by low temperature economizer will bring great economic and environment benefit. Referring to the data from a typical 670t/h boiler in Zhenhai Power Station, two-stage low temperature economizers are designed to utilize the waste heat from flue gas to heat the condensate water, which has the benefit of energy-step-utilization. With this technology the thermal efficiency of whole plant can be improved, decreasing the coal and water consumption, increasing the generated energy, having remarkable economic and social benefits.

关 键 词：电站锅炉 余热利用 低温省煤器 

分 类 号：TK115[动力工程及工程热物理—热能工程]