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应用能源技术
doi:10. 3969/j. issn. 1009 3230. 2015.11. 006
2015年第11期（总第215期）
300MW机组循环水余热回收利用经济性分析
陈新杰'，张超'，王妍飞”
（1.国电怀安热电有限公司，河北怀安076150；2.华北电力大学，河北保定071003）
摘要：汽轮机的排汽将产生大量的低温余热，这些余热伴随循环水被带到冷却塔进行冷
环水释放到冷却塔中的热量，将这部分热量通过吸收式热泵转移到热网循环水中加以利用，降低了热电厂能源消耗，提高电厂热效率，合理利用了能源。以河北某热电厂300MW机组为例，对利用吸收式热系回收这些低温余热进行了研究分析，认为吸收式热象能够回收电广循环水的余热，同时能够减少污染物的排放，具有显著的经济和环境效益。
关键词：吸收式热泵：热电厂；热效率；循环水余热中图分类号：TK229.4
文献标志码：B文章编号：1009-3230(2015)11-0018-06
Economic Analysis of Recycling Water Waste Heat Recovery
andUtilizationof3o0MWUnit CHEN Xin jie', ZHANG Chao', WANG Yan -fei?
(1.State Power Thermal Power Co.,Ltd. Huaian 076150,Hebei Province,China; 2.North China Electric Power University,Baoding 071003,Hebei Province,China）
Abstract: A steam turbine exhausts steam will produce a lot of low temperature heat, the residual heat with circulating water is brought to the cooling tower for cooling, caused a lot of the heat wasted, but also caused a certain amount of steam and water loss. Absorption heat pump units recycles the heat which circulating water discharged in the cooling tower, through the absorption heat pump this part of heat will be taken into the circulating water to reduce the power plant energy consumption, improve the thermal efficiency of power plant, make use of energy reasonably. By a 300 MW power plant unit in South Network of Hebei Province as an example, using the absorption heat pump to recycle residual heat was studied and analyzed, that the absorption heat pump can recycle residual heat of circulating water from power plant, while reducing the emission of pollutants, with significant economic and environmental benefits.
Key words:Absorption heat pump;Thermal power plant;Thermal efficiency; Circulating water waste heat
0引言
目前，一般的大型火力发电机组，大约有一半以上的输入能量散失到环境中。对于湿冷机组而言，发电效率低主要原因是冷源损失。冷源损失
收稿日期：2015-1011
修订日期：20151021
作者简介：陈新杰（1976-），男，大学本科，工程师，研究方
向为电厂集控运行。
万方数据
指由循环冷却水带到大气中的热量，这部分热量损失巨大，约占火电厂消耗能源的50%，但是这部分能量的品味很低，温度一般在30~40℃左右[1-2]，回收难度相对较大。
对于作为集中供热主热源的热电厂而言，存在两个关键问题有待解决。一是汽轮机抽