高岭土对准东煤结渣特性影响试验研究
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摘要
高岭土对防止准东煤结渣有一定的效果,但现有研究多是在实验室条件下进行的,与实际锅炉内应用环境差别较大。为研究高岭土在实际锅炉燃烧环境下对准东煤结渣的影响,本文在一台全烧准东煤的锅炉上,利用一根结渣探针伸入炉内模拟锅炉水冷壁,高岭土粉末由空气输送并喷射到探针表面以验证其防结渣效果。现场试验结果表明:高岭土防结渣效果与其自身组分直接相关,若高岭土中本身碱金属质量分数就偏高,则无法缓解准东煤的结渣。
Existing researches showed that the slagging of Zhundong coal will be prevented to a certain extent by adding kaolin. However, most of the existing studies are conducted under laboratory conditions, the combustion characteristics in the laboratory are very different to the actual boilers. To reveal the anti slagging effect of kaolin on an actual boiler, a field experiment was carried out on a boiler burning Zhundong coal. A slagging probe was put into the furnace to simulate the water wall of the boiler. The pulverized kaolin was transported by the air and jet onto the surface of the slagging probe to verify the effect of anti slagging. The results show that, the anti slagging effect depends on the component of kaolin itself directly. The slagging of Zhundong coal will not be prevented by adding kaolin if the alkali metal content in the kaolin is too high.
Existing researches showed that the slagging of Zhundong coal will be prevented to a certain extent by adding kaolin. However, most of the existing studies are conducted under laboratory conditions, the combustion characteristics in the laboratory are very different to the actual boilers. To reveal the anti slagging effect of kaolin on an actual boiler, a field experiment was carried out on a boiler burning Zhundong coal. A slagging probe was put into the furnace to simulate the water wall of the boiler. The pulverized kaolin was transported by the air and jet onto the surface of the slagging probe to verify the effect of anti slagging. The results show that, the anti slagging effect depends on the component of kaolin itself directly. The slagging of Zhundong coal will not be prevented by adding kaolin if the alkali metal content in the kaolin is too high.
引文
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[10]李瑞连,杜梅芳,乌晓江,等.高岭土对准东高碱煤煤灰熔融特性影响的量子化学与实验研究[J].燃料化学学报,2016,44(5):513-520.LI Ruilian,DU Meifang,WU Xiaojiang,et al.Effect of kaolin on the ash fusion characteristics of high alkali Zhundong coal:a quantum chemistry and experimental study[J].Journal of Fuel Chemistry and Technology,2016,44(5):513-520.
[11]乌晓江,张翔,陈楠.高岭土对新疆高碱煤沾污结渣特性的影响研究[J].锅炉技术,2017,48(2):5-9.WU Xiaojiang,ZHANG Xiang,CHEN Nan.Effect of adding clay on ash fouling/slagging characteristic of Xinjiang high alkali coal[J].Boiler Technology,2017,48(2):5-9.
[12]沈铭科,邱坤赞,黄镇宇,等.准东煤掺烧高岭土对固钠率及灰熔融特性影响研究[J].燃料化学学报,2015,43(9):1044-1051.SHEN Mingke,QIU Kunzan,HUANG Zhenyu,et al.Influence of kaolin on sodium retention and ash fusion characteristic during combustion of Zhundong coal[J].Journal of Fuel Chemistry and Technology,2015,43(9):1044-1051.
[13]张利孟,董信光,刘科,等.高岭土对准东煤结渣特性及矿物质演变的影响[J].燃料化学学报,2015,43(10):1176-1181.ZHANG Limeng,DONG Xinguang,LIU Ke,et al.Effect of kaolin on ash slagging and mineral conversion of Zhundong coal[J].Journal of Fuel Chemistry and Technology,2015,43(10):1176-1181.
[14]李宇航,张喜来,张森,等.准东煤防结渣添加剂应用试验[J].热力发电,2017,46(9):135-140.LI Yuhang,ZHANG Xilai,ZHANG Sen,et al.Experimental study on additive applied to against slagging of Zhundong coal[J].Thermal Power Generation,2017,46(9):135-140.
[15]刘家利.准东煤灰熔融性与灰成分相关性分析[J].洁净煤技术,2015,21(5):99-102.LIU Jiali.Correlation analysis of ash fusibility and ash composition of Zhundong coal[J].Clean Coal Technology,2015,21(5):99-102.
[16]杨忠灿,刘家利,姚伟.准东煤灰沾污指标研究[J].洁净煤技术,2013,19(2):81-84.YANG Zhongcan,LIU Jialii,YAO Wei.Fouling index of Zhundong coal ash[J].Clean Coal Technology,2013,19(2):81-84.
[2]杨忠灿,刘家利,何红光.新疆准东煤特性研究及其锅炉选型[J].热力发电,2010,39(8):38-40.YANG Zhongcan,LIU Jiali,HE Hongguang.Study on properties of Zhundong coal in Xinjiang region and typeselection for boilers burning this coal sort[J].Thermal Power Generation,2010,39(8):38-40.
[3]李楠,姚伟,赵勇纲,等.相图法在准东高钠煤掺烧研究中的应用[J].热力发电,2016,45(1):49-53.LI Nan,YAO Wei,ZHAO Yonggang,et al.Application of CALPHAD method in study on blended coal of Zhundong[J].Thermal Power Generation,2016,45(1):49-53.
[4]张喜来.高钠煤在电站锅炉中应用研究[R].西安:西安热工研究院有限公司,2014:4-17.ZHANG Xilai.The application research of high sodium coal used for power plant boilers[R].Xi’an:Xi’an Thermal Power Research Institute Co.,Ltd.,2014:4-17.
[5]涂圣康,张守玉,施大钟,等.添加剂对高钠煤热解过程中钠析出的影响[J].煤炭转化,2016,39(1):31-34.TU Shengkang,ZHANG Shouyu,SHI Dazhong,et al.Effect of additive on emission of sodium in high-sodium coal during pyrolysis[J].Coal Conversion,2016,39(1):31-34.
[6]王学斌,魏博,张利孟,等.温度和SiO2添加物对准东煤中碱金属的赋存形态及迁徙特性的影响[J].热力发电,2014,43(8):84-88.WANG Xuebin,WEI Bo,ZHANG Limeng,et al.Effect of temperature and silicon additives on occurrence and transformation characteristics of alkali metal in Zhundong coal[J].Thermal Power Generation,2014,43(8):84-88.
[7]赵庆庆,代纪邦,金晶,等.添加剂对准东煤灰熔融特性的影响[J].上海理工大学学报,2014(6):511-515.ZHAO Qingqing,DAI Jibang,JIN Jing,et al.Effects of additives on Zhundong coal ash melting characteristics[J].Journal of University of Shanghai for Science and Technology,2014(6):511-515.
[8]马岩,黄镇宇,唐慧儒,等.准东煤灰化过程中的矿物演变及矿物添加剂对其灰熔融特性的影响[J].燃料化学学报,2014,42(1):20-25.MA Yan,HUANG Zhenyu,TANG Huiru,et al.Mineral conversion of Zhundong coal during ashing process and the effect of mineral additives on its ash fusion characteristics[J].Journal of Fuel Chemistry and Technology,2014,42(1):20-25.
[9]KYI S,CHADWICK B L.Screening of potential mineral additives for use as fouling preventatives in Victorian brown coal combustion[J].Fuel,1999,78(7):845-855.
[10]李瑞连,杜梅芳,乌晓江,等.高岭土对准东高碱煤煤灰熔融特性影响的量子化学与实验研究[J].燃料化学学报,2016,44(5):513-520.LI Ruilian,DU Meifang,WU Xiaojiang,et al.Effect of kaolin on the ash fusion characteristics of high alkali Zhundong coal:a quantum chemistry and experimental study[J].Journal of Fuel Chemistry and Technology,2016,44(5):513-520.
[11]乌晓江,张翔,陈楠.高岭土对新疆高碱煤沾污结渣特性的影响研究[J].锅炉技术,2017,48(2):5-9.WU Xiaojiang,ZHANG Xiang,CHEN Nan.Effect of adding clay on ash fouling/slagging characteristic of Xinjiang high alkali coal[J].Boiler Technology,2017,48(2):5-9.
[12]沈铭科,邱坤赞,黄镇宇,等.准东煤掺烧高岭土对固钠率及灰熔融特性影响研究[J].燃料化学学报,2015,43(9):1044-1051.SHEN Mingke,QIU Kunzan,HUANG Zhenyu,et al.Influence of kaolin on sodium retention and ash fusion characteristic during combustion of Zhundong coal[J].Journal of Fuel Chemistry and Technology,2015,43(9):1044-1051.
[13]张利孟,董信光,刘科,等.高岭土对准东煤结渣特性及矿物质演变的影响[J].燃料化学学报,2015,43(10):1176-1181.ZHANG Limeng,DONG Xinguang,LIU Ke,et al.Effect of kaolin on ash slagging and mineral conversion of Zhundong coal[J].Journal of Fuel Chemistry and Technology,2015,43(10):1176-1181.
[14]李宇航,张喜来,张森,等.准东煤防结渣添加剂应用试验[J].热力发电,2017,46(9):135-140.LI Yuhang,ZHANG Xilai,ZHANG Sen,et al.Experimental study on additive applied to against slagging of Zhundong coal[J].Thermal Power Generation,2017,46(9):135-140.
[15]刘家利.准东煤灰熔融性与灰成分相关性分析[J].洁净煤技术,2015,21(5):99-102.LIU Jiali.Correlation analysis of ash fusibility and ash composition of Zhundong coal[J].Clean Coal Technology,2015,21(5):99-102.
[16]杨忠灿,刘家利,姚伟.准东煤灰沾污指标研究[J].洁净煤技术,2013,19(2):81-84.YANG Zhongcan,LIU Jialii,YAO Wei.Fouling index of Zhundong coal ash[J].Clean Coal Technology,2013,19(2):81-84.