HUANG Wei, ZHANG Jian-ling, PENG Min, et al. COUNTERMEASURES FOR MAIN STEAM OVERTEMPERATURE OF 600 MW SUPERCRITICAL UNIT DURING TURBINE SPEED-UP[J]. Thermal power generation, 2009, 38(5): 42-44.
HUANG Wei, ZHANG Jian-ling, PENG Min, et al. COUNTERMEASURES FOR MAIN STEAM OVERTEMPERATURE OF 600 MW SUPERCRITICAL UNIT DURING TURBINE SPEED-UP[J]. Thermal power generation, 2009, 38(5): 42-44.DOI:
A 600 MW unit supercritical unit encountered the problem of higher temperature and lower pressure of main steam on boiler side during turbine speed-up
which do not fit in with the required parameters during turbine speed-up.To address this problem
the following measures are proposed:keep the fuel consumption at 12-13t/h and stop low feedwater protection during speed-up.Reduce the feedwater flow rate to 160-180t/h.Put HP and LP heater at soon as the turbine starts to speed up
with the feedwater temperature up to 200 ℃.After the above measures have been implemented
main steam temperature is controlled at 400 ℃
main steam pressure 6-8.73Mpa and boiler water wall temperature below 350 ℃.In this way
not only main steam overtemperature problem is solved but also fuel is saved.It has both economy and safety benefits.