Primary cooling section device and method for slag granulation

The invention discloses a primary cooling section device and method for slag granulation. The primary cooling section device for slag granulation is arranged between a granulation chamber and discharge equipment and comprises an inner ring and an outer ring, wherein the inner ring and the outer ring are each of a jacket structure, and cooling water is introduced into a jacket; an annular space is formed between the outer wall of the inner ring and the inner wall of the outer ring; multiple circles of water-cooling turnover plate structures are arranged in the annular space, and the multiple circles of water-cooling turnover plate structures are sequentially and alternately mounted on the outer wall of the inner ring and the inner wall of the outer ring from top to bottom; the cooling water is introduced into the water-cooling turnover plate structures; and slag particles descend in the annular space from top to bottom in a broken line mode and are cooled through the water-cooling turnover plate structures. Ac