制冷学报2017，Vol.38Issue(6)：39-45,7.DOI:10.3969/j.issn.0253-4339.2017.06.039
基于喷淋换热的燃煤锅炉烟气余热回收系统建模及模型验证
Establishing and Validating a Model of Waste?heat Recovery System for Coal?fired Boilers based on Spray Tower
摘要
Abstract
Coal?fired boilers and thermal power plants are the primary heating resource in the district heating field. However, they have great energy?saving potential because of the significant heat loss from the high?temperature discharging flue gas. In view of the existing problems, a waste?heat recovery system for coal?fired boilers based on a spray tower is presented. It could efficiently recover the latent heat and improve the system efficiency and economic performance by using a spray?tower heat exchanger and absorption heat pump. In this study, a model was built for this system and validated with measured data in a practical project. The system was then evaluated from the points of view of energy saving, emission reduction, and economic feasibility. The results show that the simulation results of the model are roughly in line with the trend of the observed results, and the absolute and relative errors are in a reasonable range, which proves that the model is reasonable. Meanwhile, the boiler thermal efficiency can rise to 104. 5％, the pollutant emissions can obviously decrease, and the quantity of collected condensate water can reach 18,000 tons a year. In addition, the payback period is 3. 96 years. In summary, the proposed system has higher energy efficiency and better economic benefits than existing systems.关键词
余热回收/EES建模/燃煤锅炉/喷淋换热/节能减排Key words
waste heat recovery/EES/coal⁃fired boiler/direct⁃contact heat exchange/energy conservation and emission reduction分类
能源科技引用本文复制引用
赵金姊,赵玺灵,王静贻,付林,孙方田,张世钢..基于喷淋换热的燃煤锅炉烟气余热回收系统建模及模型验证[J].制冷学报,2017,38(6):39-45,7.基金项目
国家自然科学基金(51706115)资助项目. (The project was supported by the National Natural Science Foundation of China (No. 51706115).) （51706115）
