| 摘要 |
<p>The method of the present invention achieves a reduction in scale formation in process lines and collection tanks following a regeneration tank in the flue gas desulfurization (FGD) process system. The method achieves a reduction in scale formation by the removal of sulfates, primarily in the form of calcium sulfate or gypsum, as well as calcium chloride from the system. Removal occurs by one or more of the following which achieve a removal of sulfates from the system: 1) crystallizing gypsum in an overflow tank located after a regeneration tank by providing seed crystals; 2) producing and crystallizing gypsum from a post regeneration tank liquor line while at the same time producing MgCl2; and 3) producing and crystallizing gypsum from the system return line while at the same time producing MgCl2. <IMAGE></p> |
