| 摘要 |
Provided is a calcium carbonate/calcium hydrate-gypsum wet desulphurization and dedusting process for flue gas. In the process, water as a desulphurizing agent is brought into contact with raw flue gas to accomplish desulphurization and dedusting, and the purified flue gas exchanges heat with the raw flue gas and is then discharged out from a chimney (3); the aqueous acid-containing solution after the desulphurization is separated from acidic ash; an aqueous sulphur-containing solution and a calcium carbonate or calcium hydrate slurry are subjected to a neutralization reaction to form calcium sulphite and calcium sulphate; the neutralization solution and oxygen (air) are subjected to an oxidation reaction to convert the calcium sulphite into calcium sulphate; and the oxidation solution is dehydrated to obtain a high-quality gypsum, and reclaimed water obtained by treating waste water is recycled as the desulphurizing agent, formulated into a calcium carbonate or calcium hydrate slurry or discharged out. A desulphurization and dedusting device (2) is free of scaling, wearing and nozzle clogging. |
