Multi-steam-source feed water temperature control system for low-load operation of unit

The utility model relates to a multi-steam-source feed water temperature control system for low-load operation of a unit. The multi-steam-source feed water temperature control system comprises a boiler, an SCR reactor, a main steam pipeline, a feed water pipeline, a steam turbine high-pressure cylinder, an ejector and a heater. Wherein the SCR reactor is connected with the boiler through a flue, and a temperature monitor is arranged at an inlet of the flue; wherein a power steam inlet of the ejector is connected with a main steam pipeline, an outlet of the ejector is connected with the heater,a steam regulating valve and a first steam isolating valve are arranged on a pipeline between the power steam inlet of the ejector and the main steam pipeline, and a second steam isolating valve is arranged on a pipeline between an outlet of the ejector and the heater; and the heater is arranged on the water supply pipeline. 本实用新型涉及一种用于机组低负荷运行的多汽源给水温度控制系统，包括锅炉、SCR反应器、主蒸汽管道、给水管道、汽轮机高压缸、喷射器和加热器；所述SCR反应器通过烟道与所述锅炉连接，且所述烟道的入口