Discussion on Waste Heat Utilization System of Coal-Fired Utility Boilers

doi:10.11930/j.issn.1004-9649.2016.10.001.06

Abstract

Abstract: In recent years, it has been highly required for China's thermal power generation enterprises to reduce coal consumption rate to the stage with the accuracy up to milligrams. For the sake of improving the unit efficiency by deeply recovering the waste heat of boiler flue gas, the characteristics of four kinds of coal-fired boiler waste heat utilization system are introduced. Taking a 660-MW USC unit for example, the energy-saving effect of three waste heat utilization systems are analyzed by equivalent enthalpy drop method. The result shows that the cold air heater plus air heater flue gas bypass system has the best energy-saving effect with the coal consumption reduction of about 3.7 g/(kW·h).

Key words: coal-fired power, waste heat utilization, flue gas cooler, WGGH, cold air heater, flue gas bypass of air heater

CLC Number:

TM621
TK11

LIU Yugang, , YI Guangzhou,. Discussion on Waste Heat Utilization System of Coal-Fired Utility Boilers[J]. Electric Power, 2016, 49(10): 1-6.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.10.001.06

https://www.electricpower.com.cn/EN/Y2016/V49/I10/1

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