Low-concentration formaldehyde sterilization system and use method thereof

The invention relates to a low-concentration formaldehyde sterilization system. The system includes: a sterilization cavity, which accommodates a sterilization material; a formaldehyde storage tank, which is internally loaded with a 2% formaldehyde solution and is connected to the sterilization cavity through a first pipeline, on which a formaldehyde gasification chamber is fixedly installed for gasifying formaldehyde, wherein the temperature of the formaldehyde gasification chamber is 121DEG C-130DEG C; a formaldehyde water-dissolving tank, which is connected to a water inlet pipeline and a water outlet pipeline, and is connected to the sterilization cavity through a second pipeline, on which a water-ring vacuum pump is fixedly installed for vacuum pumping of the sterilization cavity andpumping of the fluid in the sterilization cavity into the formaldehyde water-dissolving tank. According to the invention, the gasification chamber is disposed for stable and continuous heating of formaldehyde so as to achieve