To solve the problems of difficult treatment of desulfurized gypsum and overmining of limestone, a kind of lime/gypsum flue gas desulfurization (FGD) collaborative desulfurized gypsum resource utilization process (LCS) was proposed. The system mainly includes the LCS-LFGD (lime/gypsum flue gas desulfurization system), LCS-C (desulfurized gypsum reduction calcining process), and carbon monoxide-coupled activated carbon reduction of SO₂ to sulfur process (LCS-S). Taking a typical wet FGD unit of 300 MW power plant in China as an example, the limestone/gypsum flue gas desulfurization system (L-FGD) process was compared with the LCS by using the method of life cycle assessment and life cycle cost (LCC). The result shows that the overall environmental impact of the LCS is 0.2913. The environmental impacts of LCS-LFGD, LCS-C, and LCS-S were 0.1322, 0.1543, and 0.0048, respectively. Both LCS-LFGD and LCS-C are the key processes in this case study, and electricity consumption and coal gas consumption are the key substances in each key process. LCC analysis showed that although the initial investment of LCS was 4.32 × 10⁶ USD ∼5.76 × 10⁶ USD more compared with L-FGD, the running cost of LCS was 1.41 × 10⁶ USD per year lower compared with L-FGD. Besides, the cost of ore mining, the quality of calcined products, and environmental protection policy will affect the financial cost of the process.

中文翻译：

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石灰/石膏烟气脱硫协同脱硫石膏资源化利用过程环境经济效应综合评价

针对脱硫石膏处理难、石灰石过度开采等问题，提出了一种石灰/石膏烟气脱硫（FGD）协同脱硫石膏资源化利用工艺（LCS）。该系统主要包括LCS-LFGD（石灰/石膏烟气脱硫系统）、LCS-C（脱硫石膏还原煅烧工艺）、一氧化碳偶联活性炭还原SO ₂硫工艺 (LCS-S)。以我国典型的300MW电厂湿法FGD装置为例，采用生命周期评价和生命周期成本（LCC）的方法，将石灰石/石膏烟气脱硫系统（L-FGD）工艺与LCS工艺进行比较。 ）。结果表明，濒海战斗舰的整体环境影响为0.2913。LCS-LFGD、LCS-C和LCS-S的环境影响分别为0.1322、0.1543和0.0048。LCS-LFGD和LCS-C都是本案例研究的关键过程，电力消耗和煤气消耗是每个关键过程的关键物质。LCC 分析表明，虽然 LCS 的初始投资比 L-FGD 多4.32 × 10 ⁶ USD ∼5.76 × 10 ⁶ USD，但 LCS 的运行成本为 1.41 × 10 ⁶美元每年低于 L-FGD。此外，矿石开采成本、煅烧产品质量和环保政策都会影响该过程的财务成本。