Open AccessEffect of Flue Gas Recirculation on Operating Performance of Coal-Fired Unit Boiler
Author(s) -
Limeng Zhang,
Xiaoli Dong,
Fuxing Cui,
Haichao Wang,
Liu Jinglong,
Zhishan Hu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/677/3/032035
Subject(s) - flue gas , boiler (water heating) , coal , waste management , air preheater , environmental science , flue gas emissions from fossil fuel combustion , superheated steam , flue , petroleum engineering , engineering
Taking the flue gas recirculation system of 220MW coal-fired unit as the test object, effects of the operation mode of the flue gas recirculation system on the operating characteristics of the boiler under different working conditions was studied. The results show: To a certain extent, the operation of flue gas recirculation system will reduce boiler efficiency, which is more obvious under low load conditions. However, The operation of the flue gas recirculation system can effectively increase temperatures of reheat steam and superheated steam.Comparing the economics of the front and rear units of the flue gas recycling system, it can be find that net coal consumption of the unit under the load of 200MW and 140MW can be reduced by up to 1.51g/kW·h and 1.86g/kW·h respectively.