through test and study

the causes leading to burn-out of burners for boiler NO.4 in Zhenhai Power-generation Co Ltd have been determined

and problems of Low reheat-steam temperature and high exhaust flue gas temperature being deeply analysed. A tecnnical retrofit scheme of the combustion system

reheater

and economizer has been put forward. After implementing the said scheme

obvious reults have been obtaind

having significance for reference to the work of energy-saving and potential-exploiting for boiler of 200 MW units.