1000 MW机组烟气余热利用方案对比  

Comparison of Flue Gas Waste Heat Utilization Schemes for 1000 MW Units

作　　者：张健 甄辉 向柏祥 李燕 黄军 王鹏 王大鹏 Zhang Jian;Zhen Hui;Xiang Baixiang;Li Yan;Huang Jun;Wang Peng;Wang Dapeng(Shenhua Guohua (Beijing) Electric Power Research Institute Co., Ltd., Beijing 100025, China;Guohua Dingzhou Power Station,Baoding 071003, Hebei Province, China)

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025 [2]国华定州电厂,河北保定071003

出　　处：《发电设备》2021年第5期370-374,共5页Power Equipment

基　　金：国家重点研发计划(2018YFB0604200)。

摘　　要：为了充分利用排烟余热,采用0号高压加热器(简称高加)入口给水、0号高加疏水、凝结水或原系统冷媒水作为冷却介质,降低热一次风温度。结果表明:高加疏水相变换热性价比最高。在降低一次风温度的基础上,比较4种排烟余热利用方案,即加装一次风暖风器时一级省煤器的2种利用方式,以及不加装一次风暖风器时低压加热器是否换热。结果表明:在锅炉0 m层设置热一次风换热器,并设置一次风暖风器,可最大幅度降低造价,预期最高节煤量为2.2 g/(kW·h)。In order to make full use of the waste heat of exhaust gas,the inlet feed water of No.0 high-pressure heater,drain water of No.0 high-pressure heater,condensate water or refrigerant water of the original system were used as coolant to reduce hot primary air temperature.The results show that the phase-change heat transfer of drain water has the highest cost performance.On the basis of reducing primary air temperature,two utilization modes of primary economizer with primary air heater and whether the low-pressure heater exchanges heat without primary air heater were compared.The results show that the cost can be greatly reduced by the installation of primary air heat ex-changer and primary air heater at 0 m of boiler,and the maximum coal saving is expected to be 2.2 g/(kW·h).

关 键 词：低温省煤器 余热 经济性 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]