Oil and gas field sewage evaporator

The utility model discloses an oil and gas field sewage evaporator which comprises an evaporator body and a purifying mechanism, the purifying mechanism is arranged on the outer wall of the evaporator body and comprises a purifying box, the purifying box is installed on the outer wall of the evaporator body in a matched mode, and a hinge is installed on the outer wall of the purifying box in a matched mode. A sealing door is connected to the outer wall of the hinge in an overturning mode, a sealing ring is connected to the front face of the sealing door in an adhesive mode, through arrangement of the purification mechanism, the effect of purifying harmful gas generated during sewage evaporation can be achieved, and when the device is used, activated carbon is placed in the purification box, so that the purification effect is improved; when harmful gas is discharged outdoors through the activated carbon, the harmful gas can be purified, and the situation that the harmful gas is directly discharged outdoors, co