PRILLING TOWER AND METHOD OF PRODUCING, IN PARTICULAR, UREA Russian patent published in 2018 - IPC B01J2/04 C07C273/00 

FIELD: chemistry.

SUBSTANCE: prilling tower comprises a housing provided with an internal processing chamber, a spraying device disposed at an upper axial end of the housing for feeding a liquid phase of molten urea, windows installed at the lower axial end of the housing for air supply, and a transfer structure disposed at the lower axial end of the housing below the windows, to collect the formed solid products in the form of pellets and transfer them in the direction of the lower outlet. The transfer structure contains a number of expanding sectors, coaxial and aligned with each other and arranged in series and converging downward. In particular, the structure comprises an upper sector mounted at the upper end of the structure, a lower sector installed at the lower end of the structure, and an intermediate sector located between the upper sector and the lower sector. The transfer structure does not have mechanical scrapers and the sectors are partially inserted into each other both axially and radially and each pair of sectors arranged in series is formed by two sectors having respective peripheral edges inserted one into the other. The upper sector of this pair, located above the other along the axis, has a peripheral lower edge located lower and radially inside the upper peripheral edge of the sector below it. The sectors have inner lateral surfaces inclined to cause the pellets settled on the inner lateral surfaces to slide only under gravity in the direction of the lower outlet and the lateral walls having an inclination with respect to the horizontal plane greater than 45°.

EFFECT: increasing the efficiency of production and quality of the product.

18 cl, 3 dwg