基于煤干燥技术与乏汽GGH的燃煤电站清洁高效协同系统
发布时间：2019-03-08 17:00
【摘要】：低温省煤器与气-气换热器(GGH)分别具备良好的节能与环保效果,但二者无法同时布置。对此,本文提出燃煤电站清洁高效协同系统,该系统应用煤干燥技术,在燃煤电站的锅炉尾部布置低温省煤器,在干燥装置尾部布置GGH,以同时达到节能与环保效果。针对所提出的清洁高效协同系统,以典型超超临界1 000 MW一次再热机组为案例,以传统低温省煤器系统与GGH系统作为参比系统,进行了热力学分析与经济性分析。结果表明:新清洁高效协同系统能增加发电量14.7 MW,回收水分13.9 kg/s,增加收益2 624万元/a,节能效果与经济效益显著;能够提升最终排烟温度到80℃以上,有效提升烟气浮升力与污染物稀释能力,同时降低CO_2排放量54 134 t/a,环保效果良好
[Abstract]:Low-temperature coal economizer and gas-gas heat exchanger (GGH) have good energy saving and environmental protection effects respectively, but they can not be arranged at the same time. In this paper, a clean and efficient coordination system for coal-fired power plants is proposed. The system applies coal drying technology, which is equipped with low-temperature economizer at the end of the boiler and GGH, at the end of the coal-fired power station in order to achieve energy saving and environmental protection at the same time. Aiming at the proposed clean and efficient cooperative system, the thermodynamic analysis and economic analysis of a typical ultra-supercritical 1 000 MW primary reheating unit and the traditional low temperature economizer system and GGH system as a reference system are carried out. The results show that the new clean and efficient cooperative system can increase the power generation by 14.7 MW, recover water 13.9 kg/s, increase the income by 26.24 million yuan / a, and the energy saving effect and economic benefit are remarkable. It can increase the final exhaust temperature above 80 鈩，
本文编号：2437012
[Abstract]:Low-temperature coal economizer and gas-gas heat exchanger (GGH) have good energy saving and environmental protection effects respectively, but they can not be arranged at the same time. In this paper, a clean and efficient coordination system for coal-fired power plants is proposed. The system applies coal drying technology, which is equipped with low-temperature economizer at the end of the boiler and GGH, at the end of the coal-fired power station in order to achieve energy saving and environmental protection at the same time. Aiming at the proposed clean and efficient cooperative system, the thermodynamic analysis and economic analysis of a typical ultra-supercritical 1 000 MW primary reheating unit and the traditional low temperature economizer system and GGH system as a reference system are carried out. The results show that the new clean and efficient cooperative system can increase the power generation by 14.7 MW, recover water 13.9 kg/s, increase the income by 26.24 million yuan / a, and the energy saving effect and economic benefit are remarkable. It can increase the final exhaust temperature above 80 鈩，
本文编号：2437012
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