In view of the complex and changeable operating environment of seawater circulating pumps in power plants in coastal areas,a comprehensive energy-saving transformation scheme was proposed to optimize the operating characteristics of seawater circulating pumps.The original impeller and guide vane of the oblique flow pump are replaced by the new impeller and guide vane of the three-dimensional flow oblique pump,which was designed and manufactured with the new generation of three-dimensional flow high-efficiency and energy-saving rotor technology.The operation efficiency of the seawater circulating pump under the condition of large flow can be greatly improved,and the operation mode can be optimized,so as to achieve the comprehensive energy-saving purpose of the circulating pump system.The technical scheme has been implemented in the transformation of B circulating water pump of Unit 2#in Guoneng(Fuzhou)Thermal Power Co.,Ltd.The field measurement results show that the comprehensive energy-saving transformation scheme of the seawater circulating pump has remarkable energy-saving effect,and has great significance for improving the economy of large thermal power units.
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