A comparative study on the regulating characteristics of flue gas temperature at SCR inlet under different reformed schemes of economizer
- DOI
- 10.2991/mmme-16.2016.83How to use a DOI?
- Keywords
- catalyst; SCR denitration efficiency; Ammonia escape rate; SCR entrance temperature; Optimize control
- Abstract
One 600MW unit in a power plant in Guangdong Province was taken as the study subject to contrastively analyze four different smoke temperature lifting schemes through thermodynamic calculation. The result indi-cate the non-feasibility of the feed water bypass scheme and the economizer exit water bypass recycling scheme due to the inadequate regulating ability; When the required SCR entrance smoke temperature ranges within 0~40 , the economizer smoke bypass scheme shows good regulating ability however the exhaust gas temperature rises, calling for measures e.g. low temperature economizer retrofit to counteract the effect that exhaust gas temperature rises decreasing boiler efficiency. The economizer staging retrofit scheme shows sig-nificant smoke temperature regulating ability despite the influence of reserved space and retrofit cost. When the removed area occupies less than 50% of the original economizer, SCR entrance smoke temperature ranges within 0~40 , ensuring normal operation under high load and the exhaust gas temperature is not so high that the boiler operation economy is affected.
- Copyright
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Y.J. Liao AU - Y.X. Yu AU - L.W. Sun AU - J.H. Fan PY - 2016/10 DA - 2016/10 TI - A comparative study on the regulating characteristics of flue gas temperature at SCR inlet under different reformed schemes of economizer BT - Proceedings of the 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering PB - Atlantis Press SP - 367 EP - 371 SN - 2352-5401 UR - https://doi.org/10.2991/mmme-16.2016.83 DO - 10.2991/mmme-16.2016.83 ID - Liao2016/10 ER -