A method for the production of a coarse-grained ammonium sulfate - product by crystallization and plant for carrying out the method

摘要

A method for the production of a coarse-grained ammonium sulfate - product by crystallization and plant for carrying out the method the invention relates to a method for the continuous production of a coarse-grained ammonium sulfate - product from a ammonium sulfate - solution in a according to the dtb - principle operated crystallizer (1) with an internal suspension circuit and with a sedimentation zone (3), from the constantly a clarified partial flow of solution in an external circuit (7) is pulled off, for the resolution of the solids contained therein in a heat exchanger (9) and then heated again as a clear solution in the lower region (2) of the crystallizer (1) is returned. To ensure the production of a product crystals with virtually constant in the course of the coarse grain size, it is proposed that from the sedimentation zone (3) as a further partial stream is a finely crystal suspension stream off, and without any previous resolution of the contained solids content in the internal circuit is returned to the crystallization stage.