化工进展 ›› 2021, Vol. 40 ›› Issue (12): 6629-6639.DOI: 10.16085/j.issn.1000-6613.2021-0081

• 能源加工与技术 • 上一篇    下一篇

高炉煤气特征组分分析及其对脱硫过程的影响研究进展

李翔1(), 王学谦1(), 李鹏飞2, 王郎郎1, 宁平1(), 马懿星1, 曹睿1, 钟磊1   

  1. 1.昆明理工大学环境科学与工程学院,云南 昆明 650500
    2.中冶节能环保有限责任公司,北京 100088
  • 收稿日期:2021-01-13 修回日期:2021-03-12 出版日期:2021-12-05 发布日期:2021-12-21
  • 通讯作者: 王学谦,宁平
  • 作者简介:李翔(1989—),男,博士研究生,研究方向为工业废气净化及资源化。E-mail:398766492@qq.com
  • 基金资助:
    国家重点研发计划(2018YFC0213400);国家自然科学基金(52070090);云南省科技计划(202001AU070031)

Progress on characteristic components analysis of blast furnace gas and its influence on desulfurization process

LI Xiang1(), WANG Xueqian1(), LI Pengfei2, WANG Langlang1, NING Ping1(), MA Yixing1, CAO Rui1, ZHONG Lei1   

  1. 1.Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan,China
    2.Energy-saving and Environment Protection, Ltd. , MCC, Group, Beijing 100088, China
  • Received:2021-01-13 Revised:2021-03-12 Online:2021-12-05 Published:2021-12-21
  • Contact: WANG Xueqian,NING Ping

摘要:

高炉煤气(BFG)作为炼铁过程中副产的可燃气体,具有明显的资源回收价值,但其同时存在热值低、成分复杂等问题。目前大多数研究集中在对羰基硫(COS)、硫化氢(H2S)等有害成分的脱除,而鲜有对高炉煤气特征组分的研究或报道。研究者对高炉煤气特征组分的来源、生成路径等不明朗,导致在研究过程中忽略了煤气复杂组分的相互影响,很多技术在工业应用时问题频发。本文阐述并分析了高炉煤气特征组分的来源及生成路径,进而讨论了高炉煤气特征组分对脱硫过程的影响。高炉原料、燃料和空气在高温条件下经过复杂的化学反应,生成粉尘、N2、O2、CO、CO2、H2、CH4、H2O、HCl、HCN、硫化物等共同组成高炉荒煤气,荒煤气中的O2、COx、H2、H2O、HCl、硫化物等化学成分对COS转化或H2S脱除过程产生影响,导致催化剂中毒或转化率下降。本文通过分析探讨特征组分在高炉煤气产生和脱硫净化过程中的相互作用及影响规律,为超低排放背景下高炉煤气的净化和资源化提供方向和参考。

关键词: 高炉煤气特征组分, 来源, 反应, 脱硫, 化学过程, 相互作用规律

Abstract:

As a kind of flammable gas from by-products of ironmaking process, blast furnace gas (BFG) has obvious value of resource recovery, however, it has several problems such as low calorific value, complex composition, etc. What’s more, most current studies focus on removal of harmful components like carbonyl sulfide (COS), hydrogen sulfide (H2S) and so on, but there are few studies or reports on the characteristic components of BFG. Researchers are not clear about the source and generation path of the characteristic components in BFG, and as a result, the interaction of complex components in BFG is neglected during the course of studies, which leads to problems frequently when the technologies are used in industry. In this paper, the source and generation path of characteristic components of BFG were expounded and analyzed, and then the influence of the characteristic components on desulfurization process is discussed. Complex chemical reactions take place between raw materials, fuels and air at high temperature, during the process of which, some characteristic components are produced and form raw gas together, such as dusts, N2, O2, CO, CO2, H2, CH4, H2O, HCl, HCN , sulfides etc. Chemical components such as O2, COx, H2, H2O, HCl and sulfides in raw gas have an effect on the process of COS conversion or H2S removal, and ultimately result in catalysts poisoning or conversion rate reduction. This paper provides some directions and references for the purification and recycling of BFG under the background of ultra-low emission by analyzing and discussing the regularity of interaction between characteristic components during the process of BFG generation and desulfurization.

Key words: characteristic components of blast furnace gas, source, reaction, desulfurization, chemical processes, regularity of interaction

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