Analysis of an improved economizer system for active control of the coal-fired boiler flue gas temperature
Yuanjing Wang and
Energy, 2019, vol. 170, issue C, 185-198
The use of a low pressure economizer (LPE) is an effective way to recover waste heat from the exhaust flue gas in thermal power plants. In this paper, an improved bypass staged economizer scheme is presented for China's 600-MW ultra-supercritical power units. The simulation models of the bypass staged economizer and traditional LPE were established based on a 600-MW unit. The simulation results showed that when the presented economizer system was adopted, the temperature of the exhaust flue gas was reduced to near the flue gas acid dew point, thereby greatly improving the energy-saving effects. Compared with the traditional LPE system, the improved economizer system can reduce standard coal consumption rate by an additional 1.1 g/kWh. The bypass ratio under different loads could be adjusted to achieve the best energy-saving effect. The optimum bypass ratio was analyzed under different loads. The results showed that the improved economizer system had a better energy-saving effect by actively controlling the exhaust flue gas temperature.
Keywords: Bypass staged economizer system; Waste heat recovery; Off-design condition; Coal-fired power plant (search for similar items in EconPapers)
References: Add references at CitEc
Citations: View citations in EconPapers (1) Track citations by RSS feed
Downloads: (external link)
Full text for ScienceDirect subscribers only
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:170:y:2019:i:c:p:185-198
Access Statistics for this article
Energy is currently edited by Henrik Lund and Mark J. Kaiser
More articles in Energy from Elsevier
Bibliographic data for series maintained by Dana Niculescu ().