Desuperheater structure for steam boiler

The desuperheater structure comprises a desuperheater pipeline and a desuperheater inner sleeve in the desuperheater pipeline, and a plurality of inner sleeve fixing clamping blocks distributed in the circumferential direction and a plurality of inner sleeve anti-moving check blocks distributed in the circumferential direction are arranged on the portions, at the upstream end and the downstream end of the desuperheater inner sleeve, of the inner wall of the desuperheater pipeline correspondingly; the inner sleeve fixing clamping block is L-shaped, one end of the inner sleeve fixing clamping block is welded to the inner wall of the desuperheater pipeline, and the other end of the inner sleeve fixing clamping block clamps the inner wall of the upstream end of the desuperheater inner sleeve; the inner sleeve anti-moving check block is welded to the inner wall of a desuperheater pipeline on the downstream of the desuperheater inner sleeve, and it is ensured that the desuperheater inner sleeve is blocked by the in