FIELD: machine engineering.
SUBSTANCE: furnace consists of a body, a box of unloading end, a box of loading end and a drive actuating the body of the furnace. At the unloading end, there are nozzles for burning fuel. A loading pipe and a flue connected to hydration tower are built in the box of the furnace loading end. There is no air duct in the upper part of the furnace body, the flue is in the zone of the furnace body radius, in which the center of the furnace is an axial line of the furnace. The direction of the flue gases in the flue is parallel to the direction of the axial line of the furnace or passes at an angle of less than 45°. During operation of the furnace, according to the technology for production of phosphoric acid by furnace method, the material is supplied in the box of the furnace loading end. The nozzles for fuel combustion are ignited, the system is heated, the material of the phosphoric ore is heated under conditions of elevated temperature, having reduced, it produces furnace flue gases. When flue gases enter the flue outlet they do not deflect significantly and prevent centrifugal physical settling at the loading end of the furnace. The metaphosphoric acid in the air enters the hydration tower immediately after the furnace flue gases.
EFFECT: invention effectively solves the problem of sealing rings at the loading end of the furnace.
10 cl, 8 dwg
