廖伟辉,饶勇,吕兴城,阮志龙,傅勇强,李华鸿,陈端,马帅,姚斌,赵永椿

• 1:广东红海湾发电有限公司
• 2:湛江中粤能源有限公司
• 3:华中科技大学能源与动力工程学院

摘要(Abstract)：

为研究高碱煤热转化过程中钠的释出特性，采用原煤和水萃取煤分别进行燃烧实验和热解实验来对比分析高碱煤和低碱煤中钠的释出特性，探究不同煤质的煤样在燃烧时煤样中不同赋存形态钠的释出特性变化以及气氛变化对钠释出的影响。结果表明：在进行燃烧实验时，高碱煤在300～500℃时钠的释出量增加缓慢，在500～1 100℃时钠的释出量增加较快，低碱煤在300～500℃时钠的释出量增加较快，在500～1 100℃时钠的释出量增加缓慢，由此可知煤质是影响钠释出的主要原因之一，钠的释出特性会因煤质中成分差异而受到较大影响；燃烧和热解2种不同气氛下钠释出特性相似，热解过程中钠释出率变化平缓，且热解过程中钠释出率会比燃烧过程低7.0%左右；有机钠和水溶性钠2种不同赋存形态钠因释出途径不同而导致释出特性有所差异。

关键词(KeyWords)： 高碱煤;钠释出;赋存形态;燃烧;热解

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2022YFB4202000）~~

作者(Author): 廖伟辉,饶勇,吕兴城,阮志龙,傅勇强,李华鸿,陈端,马帅,姚斌,赵永椿

DOI: 10.19666/j.rlfd.202309164

参考文献(References)：

• [1]陈大元,刘家利,方顺利,等.准东煤锅炉掺烧时煤灰成分控制研究[J].热力发电, 2020, 49(1):26-33.CHEN Dayuan, LIU Jiali, FANG Shunli, et al. Control of coal ash composition during co-combustion of Zhundong coal boiler[J]. Thermal Power Generation, 2020, 49(1):26-33.
• [2]贾子秀,周广钦,李宇航,等.碱性金属在立式旋风炉上的迁移规律研究[J].热力发电, 2019, 48(8):81-86.JIA Zixiu, ZHOU Guangqin, LI Yuhang, et al. Migration law of alkaline metal in vertical cyclone furnace[J].Thermal Power Generation, 2019, 48(8):81-86.
• [3] LI K, YAN W, YU L, et al. Simultaneous determination of Na concentration and temperature during Zhundong coal combustion using the radiation spectrum[J]. Energy&Fuels, 2021, 35(4):3348-3359.
• [4]王长安,罗茂芸,熊若宸,等. CO2-水洗对准东高碱煤Na/Ca脱除性能的影响[J].煤炭学报, 2023, 48(2):996-1005.WANG Chang’an, LUO Maoyun, XIONG Ruochen, et al. Effect of CO2-water washing on Na/Ca removal performance of Zhundong high-alkali coal[J]. Journal of China Coal Society, 2023, 48(2):996-1005.
• [5]宋伟,黎懋亮.高碱煤燃烧结渣和沾污试验及锅炉针对性运行措施研究[J].煤炭科技, 2022, 43(6):75-78.SONG Wei, LI Maolaing. Study on slagging and contamination test of high alkali coal combustion and targeted operation measures of boiler[J]. Coal Science&Technology Magazine, 2022, 43(6):75-78.
• [6]文博,杨忠灿,屠竞毅,等.大型准东煤锅炉炉型和燃烧方式选择研究[J].热力发电, 2021, 50(10):71-77.WEN Bo, YANG Zhongcan, TU Jingyi, et al. Selection of furnace type and combustion mode for large scale boiler firing Zhundong coal[J]. Thermal Power Generation, 2021, 50(10):71-77.
• [7]白杨,郭洋洲,高国栋,等.煤粉锅炉高比例燃用准东高碱煤试验研究[J].热力发电, 2023, 52(7):157-166.BAI Yang, GUO Yangzhou, GAO Guodong, et al.Experimental study on burning high ratio of Zhundong high alkali coal in a pulverized coal boiler[J]. Thermal Power Generation, 2023, 52(7):157-166.
• [8]李芳芹,沈海燕,王冠军,等.电站锅炉燃用高碱煤对燃烧特性影响研究[J].上海电力大学学报, 2022,38(6):539-545.LI Fangqin, SHEN Haiyan, WANG Guanjun, et al.Research on combustion characteristics of high-alkali coal in a power station boiler[J]. Journal of Shanghai University of Electric Power, 2022, 38(6):539-545.
• [9]张雪慧,魏博,马瑞,等.准东地区粉煤灰改性做高碱煤缓焦剂的熔融性能评估[J].热力发电, 2019, 48(1):43-48.ZHANG Xuehui, WEI Bo, MA Rui, et al. Evaluation of fusion characteristics of modified fly ash when used as slagging inhibitor for high alkali coal in Zhundong area[J]. Thermal Power Generation, 2019, 48(1):43-48.
• [10]王运泉,张汝国,王良平,等.煤中微量元素赋存状态的逐提试验研究[J].中国煤田地质, 1997(3):23-25.WANG Yunquan, ZHANG Ruguo, WANG Liangping,et al. Extract experiments of minor and trace element occurrence in coal[J]. Coal Geology of China, 1997(3):23-25.
• [11]张军营,任德贻,赵峰华,等.煤中微量元素赋存状态研究方法[J].煤炭转化, 1998(4):14-19.ZHANG Junying, REN Deyi, ZHAO Fenghua, et al.Research methods of occurrences of trace elements in coal[J]. Coal Conversion, 1998(4):14-19.
• [12]汉春利,张军,刘坤磊,等.煤中钠存在形式的研究[J].燃料化学学报, 1999(6):95-98.HAN Chunli, ZHANG Jun, LIU Kunlei, et al. Modes of occurrence of sodium in coals[J]. Journal of Fuel Chemistry and Technology, 1999(6):95-98.
• [13]郭帅,霍晓东,宋双双,等.高钠煤中钠的赋存形态研究[J].燃料化学学报, 2017, 45(10):1172-1177.GUO Shuai, HUO Xiaodong, SONG Shuangshuang,et al. Occurrence modes of sodium species in sodium-rich coals[J]. Journal of Fuel Chemistry and Technology, 2017, 45(10):1172-1177.
• [14]阿斯亚·巴克,王猛,马如英,等.准东煤中钠的赋存状态及分布特征[J].煤炭技术, 2022, 41(12):247-252.BAKE Asiya, WANG Meng, MA Ruying, et al.Occurrence and distribution characteristics of sodium in Zhundong coal[J]. Coal Technology, 2022, 41(12):247-252.
• [15]李想,孙文博,吕太,等.离子交换法洗涤准东煤脱钠提质研究[J].煤炭转化, 2017, 40(2):11-15.LI Xiang, SUN Wenbo, LYU Tai, et al. Ion exchange method of coal-washing and sodium-removing for Zhundong coal upgrading[J]. Coal Conversion, 2017,40(2):11-15.
• [16] NASIR S, KUCERIK J, MAHMOOD Z. A study on the wash ability of the Azad Kashmir coalfield[J]. Fuel Process Technology, 2012(99):75-81.
• [17]付子文,王长安,翁青松,等.水洗对准东煤煤质特性影响的实验研究[J].西安交通大学学报, 2014, 48(3):54-60.FU Ziwen, WANG Chang’an, WENG Qingsong, et al.Experimental investigation for effect of water washing on Zhundong coal properties[J]. Journal of Xi’an Jiaotong University, 2014, 48(3):54-60.
• [18]张军,汉春利,刘坤磊,等.煤中碱金属及其在燃烧中的行为[J].热能动力工程, 1999(2):7-9.ZHANG Jun. HAN Chunli, LIU Kunlei, et al. Alkali metals in coal and their behavior in combustion[J].Journal of Engineering for Thermal Energy and Power,1999(2):7-9.
• [19]刘敬,王智化,项飞鹏,等.准东煤中碱金属的赋存形式及其在燃烧过程中的迁移规律实验研究[J].燃料化学学报, 2014, 42(3):316-322.LIU Jing, WANG Zhihua, XIANG Feipeng, et al. Modes of occurrence and transformation of alkali metals in Zhundong coal during combustion[J]. Journal of Fuel Chemistry and Technology, 2014, 42(3):316-322.
• [20] WIBBERLEY L J, WALL T F. Alkali-ash reactions and deposit formation in pulverized coal fired boilers:the thermodynamic aspects involving silica, sodium, sulphur and chlorine[J]. Fuel, 1982, 61(1):87-92.
• [21] SCHAFER H N S. Pyrolysis of brown coals,decomposition of acid groups in coals containing carboxyl groups in the acid and canon forms[J]. Fuel,1979, 58(9):667-672.
• [22]LIANG D, XIE Q, ZHOU H, et al. Catalytic effect of alkali and alkaline earth metals in different occurrence modes in Zhundong coals[J]. Asia-Pacific Journal of Chemical Engineering, 2018, 16(2):2190.
• [23] ZENG X, YU D, LIU F, et al. Scavenging of refractory elements(Ca, Mg, Fe)by kaolin during low rank coal combustion[J]. Fuel, 2018, 223:198-210.
• [24]赵磊,王长安,朱晨钊,等.灰化方式和温度对新疆高碱煤灰理化特性的影响[J].西安交通大学学报, 2018,52(8):139-145.ZHAO Lei, WANG Chang’an, ZHU Chenzhao, et al.Effects of ashing method and temperature on the physicochemical properties of high-alkali coals in Xinjiang[J]. Journal of Xi’an Jiaotong University, 2018,52(8):139-145.
• [25] XU Y, LI S, YAO Q, et al. Investigation of steam effect on ignition of dispersed coal particles in O2/N2 and O2/CO2 ambiences[J]. Fuel, 2018, 233(1):388-395.
• [26] QUYN D M, WU H, BHATTACHARYA S P, et al.Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal. Part II. Effects of chemical form and valence[J]. Fuel, 2002, 81(2):151-158.