Proceedings of the 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering

A comparative study on the regulating characteristics of flue gas temperature at SCR inlet under different reformed schemes of economizer

Authors
Y.J. Liao, Y.X. Yu, L.W. Sun, J.H. Fan
Corresponding Author
Y.J. Liao
Available Online October 2016.
DOI
https://doi.org/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/).

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Volume Title
Proceedings of the 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering
Series
Advances in Engineering Research
Publication Date
October 2016
ISBN
978-94-6252-221-3
ISSN
2352-5401
DOI
https://doi.org/10.2991/mmme-16.2016.83How to use a DOI?
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  - https://doi.org/10.2991/mmme-16.2016.83
ID  - Liao2016/10
ER  -