Oxidizer for aldehyde silver catalytic oxidation production

The invention discloses an oxidizer for aldehyde silver catalytic oxidation production. The oxidizer comprises a shell pass cylinder which is divided into a catalytic reaction layer and a quenching section from top to bottom; a plurality of heat exchange tube nests for cooling are mounted in the quenching section; in the shell pass cylinder, an interlayer wrapping the catalytic reaction layer is formed outside the catalytic reaction layer, two steam outlets are formed in the shell pass cylinder, outside the catalytic reaction layer; the height of a steam-water mixture in the steam outlets is larger than that of the catalytic reaction layer; and the shell pass cylinder is divided into an upper inner diameter variable part and a lower inner diameter constant part. The problem that ternary mixed gas is unstable in silver layer reaction is solved, the pulling-out force of the heat exchange tube nests on tube plates is reduced, the welding qualified rate is greatly increased, and the manufacturing period is shorte