| 摘要 |
<p>A method and apparatus for flue gas desulphurization (FGD). An effluent enters suitable means (10) for removing particulates. The cleaned flue gas is then passed via duct (20) and then divided into a first flue gas stream in duct (22) and a second flue gas stream in duct (24). The first stream contains the vast majority of the flue gas, and is passed via duct (22) to wet scrubbing tower (100) wherein it is scrubbed with an aqueous slurry of finely-divided calcium carbonate, gypsum, calcium sulfite, and miscellaneous inert solids. The second flue gas stream is passed via duct (24) to a suitable dry-grinding device (30) which is capable of grinding calcium carbonate to achieve a weight median diameter of about 10 microns or less, with 99 % below 44 microns. Course calcium carbonate is held in bin (32) and passed to dry pulverizer (30) by a suitable conveyance line (34).</p> |
