Dryness improving device and method for improving dryness of steam of steam injection boiler

A dryness raiser for improving steam dryness of a steam injection boiler, mainly comprising a front end head (1), a cylinder (2), and a rear end head (3), wherein the front end head (1) is connected to the cylinder (2) by flanges, and the cylinder (2) is connected to the rear end head (3) by flanges;

• on an outer edge of a flange of the front end head (1), a plurality of compressed air circulation holes (1.8) perpendicular to the front end head (1) are provided in the middle of a flange bolt hole of the front end head (1) in a compressed air inlet passage (1.3), and the compressed air inlet passage (1.3) is connected to a fuel pipe passage (1.4) by the compressed air circulation holes (1.8);
• a plurality of compressed air heat dissipation holes (1.10) are provided in a front end face (1.9) of the front end head (1), the compressed air heat dissipation holes (1.10) are perpendicular to and are connected to the compressed air circulation holes (1.8), air heat dissipation nozzles (1.11) are disposed at tail ends of the compressed air heat dissipation holes (1.10), and a plurality of air heat dissipation jet orifices (1.14) parallel to the front end face (1.9) are evenly distributed on circumferences of the air heat dissipation nozzles (1.11).