高炉干法煤气喷碱塔脱氯效果评价的探讨
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摘要
近年来,干法除尘工艺得到普遍的应用。尽管在布袋除尘后增设了喷碱塔,但仍出现煤气与热风管道先后出现腐蚀开裂的问题。研究提出了通过直接检测喷碱塔前后煤气氯含量来评价喷碱塔脱氯效果的设备和方法,比控制喷碱液的pH值更直接、可靠。结果表明,干法除尘-喷碱塔工艺对煤气中氯的脱除率为10%～70%,对下游工序的装备存在腐蚀的风险。
In recent years,dry de-dusting technology has been widely used. Alkali liquor spray scrubber was added after dry dust-catch process to removal such the corrosive medium as chlorine. However,the problem of corrosion cracking often occurred in the gas and hot blast pipes. The evaluating method was present through directly measuring the chlorine content in gas before and after alkali liquor spray scrubber. Compared to control PH value in alkali lye,the method above mentioned is more direct and reliable. The results show that the removal rate of chlorine in gas is between 10%-70%,and there is still the risk of corrosion of the equipment in the downstream process.
In recent years,dry de-dusting technology has been widely used. Alkali liquor spray scrubber was added after dry dust-catch process to removal such the corrosive medium as chlorine. However,the problem of corrosion cracking often occurred in the gas and hot blast pipes. The evaluating method was present through directly measuring the chlorine content in gas before and after alkali liquor spray scrubber. Compared to control PH value in alkali lye,the method above mentioned is more direct and reliable. The results show that the removal rate of chlorine in gas is between 10%-70%,and there is still the risk of corrosion of the equipment in the downstream process.
引文
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[2]钟章格,池伟强,黄智斌.高炉煤气脉冲布袋除尘技术的应用[J].冶金能源,2004,23(2):16.(ZHONG Zhang-ge,CHI Weiqiang,HUANG Zhi-bin. Application of pulse-bag filters dust removal on the blast furnace gas purification system[J]. Energy for Metallurgical Industry,2004,23(2):16)
[3]常金富,刘志方,关红普,等.安钢6号高炉煤气净化系统的改造[J].工业安全与环保,2006,32(4):34.(CHANG Jin-fu,LIU Zhi-fang,GUAN Hong-pu,et al. Renovation of gas purification system on blast furnace No.6 of Anyang Steel[J]. Industrial Safety and Environmental Protection,2006,32(4):34.)
[4]黄小亚,顾智勇.高炉煤气除尘技术[J].炼铁,2003,22(3):54.(HUANG Xiao-ya,GU Zhi-yong. De-dust technology for blast furnace gas[J]. Ironmaking,2003,22(3):54.)
[5]刘宏强,张福明,刘思雨,等.首钢京唐钢铁公司绿色低碳钢铁生产流程解析[J].钢铁,2016,51(12):80.(LIU Hongqiang,ZHANG Fu-ming,LIU Si-yu,et al. Green low-carbon analysis of iron and steel manufacturing process of Shougang Jingtang Iron and Steel Company[J]. Iron and Steel,2016,51(12):80.)
[6]张延辉,李永胜,张殿安.提高高炉重力除尘器除尘率的实验研究[J].鞍钢技术,2007(6):13.(ZHANG Yan-hui,LI Yongsheng,ZHANG Dian-an. Experiment study on improving dust cleaning efficiency of BF coal gas gravity dust collector[J]. Angang Technology,2007(6):13.)
[7]肖作义,张世宇,赵常清.全干法布袋除尘技术净化高炉煤气[J].中国冶金,2010,20(6):38.(XIAO Zuo-yi,ZHANG Shiyu,ZHAO Chang-qing. Full dry bag dust collector technology adopted in gas purification on blast furnace[J]. China Metallurgy,2010,20(6):38.)
[8]柴建伟,杨静菲.高炉煤气全干法除尘技术在首秦的应用[J].河北工业科技,2009,26(4):277.(CHAI Jian-wei,YANG Jing-fei. BFG all dry dedusting technology in Shouqin[J]. Hebai Journal of Industrial Science and Technology,2009,26(4):277.)
[9]傅元坤,汤雪松.高炉氯平衡及氯在煤气管网中的分布[J].安徽工业大学学报:自然科学版,2012,29(3):198.(FU Yuankun,TANG Xue-song. Chlorine balance in blast furnace and chlorine distribution in gas pipeline[J]. Journal of Anhui University of Technology:Natural Science,2012,29(3):198.)
[10]董艳苹,张传波.干法除尘工艺高炉煤气喷碱除氯技术[J].冶金动力,2011,138(7):23.(DONG Yan-ping,ZHANG Chuanbo. Spraying alkalizer and removing chloride ion technology for blast furnace gas with dry de-dusting process[J]. Metallurgical Power,2011,138(7):23)
[11]付祎.高炉煤气干法除尘喷碱塔系统的分析与优化[J].中国冶金,2018,28(7):41.(FU Yi. Analysis and optimization of blast furnace gas dry dedusting and alkali spraying tower system[J]. China Metallurgy,2018,28(7):41.)
[12]杨殿卿,李盈涛,苏振栓,等.除尘煤气中氯盐对输送设备的危害及处理方法[J].冶金动力,2008,127(3):25.(YANG Dian-qing,LI Ying-tao,SU Zhen-shuan. Discussion on corrosion of blast furnace gas dusted by dry process[J]. Metallurgical Power,2008,127(3):25.)
[13]程申涛.宝钢1号高炉干法除尘技术应用及改进实绩[J].中国冶金,2018,28(6):48.(CHENG Shen-tao. Application and improvement of dry cleaning technology of Baosteel No.1 blast furnace[J]. China Metallurgy,2018,28(6):48.)
[14]雷仲存,朱伟明.高炉煤气干法除尘腐蚀原因及对策探讨[J].冶金动力,2011,143(1):22.(LEI Zhong-cun,ZHU Wei-ming.Pipe corrosion cause of dry dusting of blast furnace gas and countermeasures[J]. Metallurgical power,2011,143(1):22.)
[15]王翠,张建良,左海滨,等.氯元素在高炉中的热力学行为[J].中国冶金,2015,25(11):6.(WANG Cui,ZHANG Jian-liang,ZUO Hai-bin,et al. Thermodynamic behavior of chlorine in blast furnace[J]. China Metallurgy,2015,25(11):6.)