Nuclear power plant secondary circuit with dirt deposition prevention structure

The utility model relates to a nuclear power plant secondary circuit with a dirt deposition prevention structure. The nuclear power plant secondary circuit comprises a steam generator, a steam-water separation reheater, a condenser and a deaerator. The steam generator comprises a first outlet and a first inlet, the steam-water separation reheater comprises a second inlet located in the side face, a second outlet located in the top and a third outlet located in the bottom, and the condenser comprises a third inlet located in the top and a fourth outlet located in the bottom. The deaerator comprises a fourth inlet located in the top and a fifth outlet located in the bottom. The inner end of the third outlet is provided with a first purification device used for adsorbing and purifying ferromagnetic corrosives in the flowing-out medium, and the inner end of the fifth outlet is provided with a second purification device used for adsorbing and purifying ferromagnetic corrosives in the flowing-out medium. The purifi