喻海艳,吕 娟,宋戊春,江东旭,马小辉,陈海焱,林龙沅
(西南科技大学环境与资源学院,固体废物处理与资源化教育部重点实验室,四川绵阳621010)
引用格式：喻海艳,吕娟,宋戊春,等.改性沉珠对吸附脱除SO2效率的影响[J].中国粉体技术,2023,29(3)：110-116.
YU H Y,LYU J,SONG W C,et al.Effects of modified sink beads on the efficiency of SO2 removal by adsorption[J].China Powder Science and Technology,2023,29(3)：110-116.
DOI：10.13732/j.issn.1008-5548.2023.03.011
收稿日期： 2022-08-01,修回日期：2022-12-07，在线出版时间：2023-04-19 09:48。
基金项目： 国家自然科学基金项目,编号 ：11402218;四川省科技计划项目,编号 ：2020YFG0186。
第一作者简介：喻海艳(1996—),女,硕士研究生,研究方向为环境工程。E-mail：243681328@qq.com。
通信作者简介：陈海焱(1964—),男,教授,博士,研究方向为气流粉碎、气流分级与通风除尘技术。E-mail：chenhai-yan@163com。
摘要： SO2是目前危害最大的大气污染源之一,为控制SO2的超标排放,我国展开了多种脱硫剂的研究。其中粉煤灰经改性后脱硫效果得到大幅度提升。沉珠是可从粉煤灰中分选而来的一种特殊的微珠,不仅化学组分与粉煤灰基本相似,而且具有比常规粉煤灰更强的“火山灰活性”。为了探究改性沉珠对吸附脱除SO2效率的影响,对比分析改性前后沉珠的矿物组成、颗粒形貌等,并在模拟干法烟气脱硫实验平台上,实验研究改性沉珠与传统Ca(OH)2脱硫剂吸附脱除SO2的效率。结果表明：改性沉珠比原状沉珠的比表面积更大,孔隙更多,有利于提升吸附脱除烟气中SO2的效率;沉珠改性后生成水合硅酸钙、水合铝酸钙、水合硅铝酸钙等产物;对比分析 Ca(OH)2与改性沉珠的脱硫效率,Ca(OH)2的脱硫效率随时间推移明显降低,最高脱硫率为93.5%,而改性沉珠的脱硫效率稳定,最高脱硫率高达100%且持续80 min,脱硫效果明显远优于Ca(OH)2。
关键词： 烟气脱硫;脱硫效率;改性;沉珠
Abstract：SO2 is one of the most harmful air pollution sources at present.In order to control the emission of SO2 exceeding the standard,a variety of desulfurizers have been studied.The desulfurization effect of fly ash modified has been greatly improved.Sink beads are a special kind of microbeads that can be separated from fly ash.They are similar to fly ash in chemical composition and have stronger “pozzolanic activity”than conventional fly ash.In order to explore the influence of modified sink beads on the adsorption efficiency of SO2 removal,the mineral composition and particle morphology of the modified sink beads before and after modification were compared and analyzed,and the adsorption efficiency of the modified sink beads and the traditional Ca(OH)2 desulfurizer for SO2 removal was experimentally studied on the simulated dry flue gas desulfurization experimental platform.The results show that the modified sink beads have larger surface area and more pores than the original ones,which is conducive to improving the efficiency of adsorption and removal of SO2 from flue gas.The sink beads are modified to produce calcium silicate hydrate,calcium aluminate hydrate,calcium silicaluminate hydrate and other products.The desulfurization efficiency of Ca(OH)2 and the modified sink beads is compared and analyzed.The desulfurization efficiency of Ca(OH)2 decreased significantly with the passing of time,the highest desulfurization rate is 93.5%,while the desulfurization efficiency of the modified sink beads is stable,the highest desulfurization rate is up to 100% and lasted for 80 min,and the desulfurization effect is obviously better than that of Ca(OH)2.
Keywords：flue gas desulfurization;desulfurization efficiency;modification;sink beads
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