NDLI: Generalized Regeneration Theory and its Energy Saving and Emission Reduction Effects on Coal-Fired Power Generation

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Feng, Weizhong
Copyright Year	2016
Abstract	Concerns related to global warming and environmental pollution concerns have pressured coal-fired power plants to improve efficiency and reduce emissions. However, the conventional efficiency improvement methods — increasing steam pressure and temperature and reducing condenser pressure are limited by material technology and the temperature of the available cooling medium. The next step for increasing efficiency would be to add additional reheat or regenerative cycles, but this is not feasible for existing plants. In addition, as the share of renewable energy and the grid’s demands on the coal-fired power plants increases, China’s coal-fired units are faced with more and tougher challenges, including large peak-valley gaps, frequent startups and shutdowns and cost pressures. As a result, the boiler combustion efficiency decreases and incidents such as furnace explosions, aggravation and collapsing of slag and burning of facilities located downstream of the economizer become more frequent. To address these problems, the generalized regeneration theory has been proposed and a series of related technologies have been developed, providing a new approach for not only improving the efficiency of coal-fired power plants, but also resulted in boiler operation that is cleaner and safer. These technologies which include anew boiler startup technology, the high efficiency combustion and low emission technology under low load and the low oxygen, and a low NOx and high efficiency combustion technology under high load have been implemented successfully in the Shanghai Waigaoqiao No. 3 power plant. By improving the utilization of turbine extraction and reducing the exhaust loss, these innovative technologies greatly improve the environmental performance, efficiency and safety of the units in various operating conditions. In addition, improvements have been made in the boilers ability to adapt to changing coal supplies, particularly for coal with high slagging tendencies and high moisture content.
Sponsorship	Power Division Advanced Energy Systems Division Solar Energy Division Nuclear Engineering Division
File Format	PDF
ISBN	9780791850213
DOI	10.1115/POWER2016-59166
Volume Number	ASME 2016 Power Conference
Conference Proceedings	ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology
Language	English
Publisher Date	2016-06-26
Publisher Place	Charlotte, North Carolina, USA
Access Restriction	Subscribed
Subject Keyword	Cycles Temperature Condensers (steam plant) Materials science Combustion Exhaust systems Pollution Coal Energy generation Power stations Safety Turbines Oxygen Cooling Boilers Explosions Pressure Stress Emissions Slags Climate change Furnaces Renewable energy Steam Nitrogen oxides Combustion technologies
Content Type	Text
Resource Type	Article

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