论文资料：脱硫工艺中石灰石湿式FGD添加剂的比较分析.docVIP

脱硫工艺中石灰石湿式FGD添加剂的比较分析 张晖 华能国际电力股份有限公司福州电厂, 福建省长乐市筹东ABSTRACT:Current power plants using wet limestone FGD desulphurization efficiency of 95% usually，such a device in our FGD coal-fired power stations account for more than 90%，SO2 emission standards for new improvement will make some high-sulfur coal burning power plant SO2 emissions in the not up to standard．If a new desulfurization technology，we need new technology to verify the reliability and practicalityrequire a longer time and larger funds，which will greatly increase the plants initial investmentto have adopted the power plant desulfurization FGD Is unrealistic．Therefore，we think of the wet FGD process，by adding appropriate additives，not only can improve the desulfurization efficiency and utilization of sorbent，and can slow down the volatility of slurry pH，and improve the flexibility of the system．So as to achieve not only improves the efficiency of desulfurization plant to reach the national emission standards, protection of a bad environment，but also reduces the running costs of power plant desulfurization equipment，can be described as dual．Question of the stars is through the research literature on the wet limestone flue gas desulfurization technology at home and abroad in the additive situation analysis and research progress of this technology were reviewed for the next draw on experimental and theoretical research．Key words ：limestone，wet desulfurization，additive pH值的波动，提高系统的灵活性。该技术既提高了电厂脱硫效率，使其达到国家排放标准，保护了坏境，又降低了电厂脱硫装置的运行费用。本课题就是通过文献资料的调研，对国内外石灰石湿法烟气脱硫技术中添加剂的研究状况进行分析和对该技术的国内外研究进展进行综述，为下一步的实验与理论研究提供借鉴。 关键词：石灰石，湿法脱硫，添加剂1绪论 1.1 背景　　 SO2已成为当今人类面临的主要大气污染物之一，其污染源主要分为两类：天然污染和人为污染。这两种污染源的特点如表1所示，天然污染源由于量少、面广、易稀释和净化，对环境危害不大；而人为污染源由于量大、集中、浓度高，对环境造成严重危害。 表 1 SO2天然污染源和人为污染源特点比较 SO2 污染源 发生源 特性及影响 排放比例 天然污染源 海洋硫酸盐盐雾 缺少氧化的水和土壤释 放的硫酸盐 细菌分解的有机化合物 火山爆发 森林失火等 1）全球性分布，在广阔 的地区以低浓度排放， 在大气中易于稀释和被 净化 2）一般不会产生酸雨现 象，人力无法控制 1/3 人为污染源 石化燃料燃烧，占3 / 4 以上 金属冶炼 石油生产 化工生产 采矿等 1）比较集中，在占地球 表面不到1%的城市和工 业区上空占主导地位 2）酸雨发生的主要原因 3）人