Preparation device and preparation method of high-purity nitric oxide

The preparation device comprises a sodium nitrite tank and a dilute sulphuric acid tank, the sodium nitrite tank and the dilute sulphuric acid tank are communicated with a jet reactor, the jet reactor is connected to a rectifying tower, the top end of the rectifying tower is connected with a condenser, one side of the upper end of the rectifying tower is connected with a buffer tank, and the buffer tank is connected with a film press. And the outlet end of the film press is connected with an output pipe. The reaction of dilute sulphuric acid and sodium nitrite is completed by adopting the jet reactor, multiple reactions are realized by utilizing the circulating pump, the liquid phase in the jet pipe of the jet reactor can be rapidly and violently mixed, the liquid-liquid mass transfer process is fully enhanced, multiple continuous reactions are realized by virtue of the circulating pump, and the defects of slow reaction, incapability of realizing continuous production, low production cost and the like in the