Waste heat boiler explosion-proof device with purification function

The utility model relates to the field of explosion prevention of boilers, in particular to a waste heat boiler explosion-proof device with a purification function, and aims to solve the technical problems that an explosion-proof device cannot effectively perform explosion-proof protection on a waste heat boiler and flue gas is difficult to purify and filter in emergency. According to the technical scheme, the waste heat boiler explosion-proof device with the purification function comprises a first exhaust assembly, a second exhaust assembly, a rotating assembly, an electric assembly, a bearing assembly and a control assembly; an electric cylinder drives a rack to move along the inner wall of a fourth groove body and drives a third gear to rotate, so that a spherical valve rotates to be opened, smoke in a waste heat boiler can be exhausted into the atmosphere along a first exhaust pipe and a second exhaust pipe, when the electric cylinder cannot be started, a rotating handle rotates to drive a first gear to r