燃用准东煤电站锅炉灰沉积形成过程中的矿物演变与热力学模拟

杨光; 张彦威; 寇希文; 周志军; 王智化; 周俊虎; 岑可法

燃用准东煤电站锅炉灰沉积形成过程中的矿物演变与热力学模拟

浙江大学能源清洁利用国家重点实验室热能工程研究所, 浙江杭州 310027

基金项目: 国家重点基础研究发展规划(973计划,2012CB214906)资助项目

详细信息

通讯作者:
张彦威,E-mail:zhangyw@zju.edu.cn.

中图分类号: TK11⁺4
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- 被引次数: 0
出版历程
- 收稿日期: 2015-05-12
- 修回日期: 2015-07-08
- 刊出日期: 2015-10-31

Mineral conversion and thermodynamic simulation of ash deposition during Zhundong coal combustion in boiler of thermal power plant

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Funds: The project was supported by the National Basic Research Program of China (973 Program, 2012CB214906).

摘要

摘要: 选取某350 MW电站锅炉燃烧准东混煤,得到锅炉换热面灰沉积样品,主要借助XRD等手段分析了各处灰沉积物矿物形成过程,并通过Factsage 5.2从热力学平衡角度给出理论支持。结果表明,高温区域换热面灰沉积形成主要由于钠长石、钙长石等矿物在高温下经复杂变化形成低温共熔物,黏附烟气中固体颗粒而形成坚硬块状沉积物;低温区域换热面主要由于烟气中硫的沉积而发生酸性腐蚀,沉积物主要晶相为硫酸钙;省煤器换热面主要由于烟气携带的非晶态物形成松散型积灰。Factsage计算结果与实际灰样组成大致吻合,能够帮助分析灰沉积物中矿物质的转化规律。
- 准东煤 /
- 灰沉积 /
- 矿物演变 /
- 热力学模拟
Abstract: Zhundong coal blending was combusted in a 350 MW boiler. Ash deposits samples at different heat transfer surface (HTS) were collected to investigate mineral conversion of each sample. Thermodynamic equilibrium calculation was carried out to give theoretical support by virtue of Factsage 5.2. Different mechanism of each HTS was concluded as follows. At high temperature HTS, albite, anorthite and other phases help eutectics precipitate take shape, which adheres to fly ash particles and forms indurate bulk ash deposits. At low temperature HTS, sulphur-containing species are condensed from flue gas to form deposits with evidence that the main crystalline phase is anhydrite. At economizer HTS, The deposits consisted of amorphous phases carried by flue gas are loosely bonded. Calculated results by Factsage basically agreed with the phase composition of actual samples and are of assistance to mineral conversion analyses.
- Zhundong coal /
- ash deposition /
- mineral conversion /
- thermodynamic simulation

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参考文献(21)

严陆光, 夏训诚, 吕绍勤, 吴甲春, 林闽, 黄常纲. 大力推进新疆大规模综合能源基地的发展[J]. 电工电能新技术, 2011, 30(1): 1-7. (YAN Lu-guang, XIA Xun-cheng, LÜ Shao-qin, WU Jia-chun, LIN Min, Huang Chang-gang. Great promotion of development of large scale integrative energy base in Xinjiang[J]. Adv Technol Elec Eng Energy, 2011, 30(1): 1-7.)

李鹏, 曾琦, 任建平, 俞立洋. 燃用准东煤对锅炉运行的影响[J]. 华电技术, 2015, 37(1): 68-70. (LI Peng, ZENG Qi, REN Jian-ping, YU Li-yang. Influence of blending combustion of east Junggar coal on boiler operation[J]. Huadian Technol, 2015, 37(1): 68-70.)

陈川, 张守玉, 刘大海, 郭熙, 董爱霞, 熊绍武, 施大钟, 吕俊复. 新疆高钠煤中钠的赋存形态及其对燃烧过程的影响[J]. 燃料化学学报, 2013, 41(7): 832-838. (CHEN Chuan, ZHANG Shou-yu, LIU Da-hai, LIU Da-hai, GUO Xi, DONG Ai-xia, XIONG Shao-wu, SHI Da-zhong, LÜ Jun-fu. Existence form of sodium in high sodium coals from Xinjiang and its effect on combustion process[J].J Fuel Chem Technol, 2013, 41(7): 832-838.)

郭涛, 曹林涛, 黄中, 江建忠, 徐正泉. 准东高钠煤燃烧利用技术研究[J]. 煤炭技术, 2015, 34(1): 331-333. (GUO Tao, CAO Lin-tao, HUANG Zhong, JIANG Jian-zhong, XU Zheng-quan. Research on using technology in Zhundong high sodium coal combustion[J]. Coal Technol, 2015, 34(1): 331-333.)

常家星, 杨忠灿. 能够保证锅炉安全运行的准东煤灰沾污指标研究[J]. 锅炉技术, 2013, 44(6): 17-19. (CHANG Jia-xing, YANG Zhong-can. Study on Zhundong coal's ash fouling indicator to ensure safe operation of boilers[J]. Boiler Technol, 2013, 44(6): 17-19.)

刘璀巍, 胡龙. 苇湖梁电厂锅炉燃用新疆准东煤特性研究[J]. 发电与空调, 2012, 33(6): 45-47. (LIU Cui-wei, HU Long. Study on propertites of Zhundong coal in Xinjiang region[J]. Power Gener Air Cond, 2012, 33(6): 45-47.)

武利斌. 某锅炉掺烧准东煤的优化试验[J]. 华电技术, 2014, 36(8): 38-43. (WU Li-bin. Optimization experiment of east Junggar coal blending combustion in a boiler[J]. Huadian Technol, 2014, 36(8): 38-43.)

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 Zhong-can, LIU Jia-li, HE Hong-guang. Study on properties of zhundong coal in Xinjiang region and type-selection for boilers burning this coal sort[J]. Therm Power Gener, 2010, 39(8): 38-40.)

GENGDA L, SHUIQING L, QIAN H, QIANG Y. Fine particulate formation and ash deposition during pulverized coal combustion of high-sodium lignite in a down-fired furnace[J]. Fuel, 2015, 143: 430-437.

YUAN Y, LI S, YAO Q. Dynamic behavior of sodium release from pulverized coal combustion by phase-selective laser-induced breakdown spectroscopy[J]. Proc Comb Inst, 2015, 35(2): 2339-2346.

XUEBIN W, ZHAOXIA X, BO W, LAN Z, HOUZHANG T, TAO Y, HRVOJE M, NEVEN D. The ash deposition mechanism in boilers burning Zhundong coal with high contents of sodium and calcium: A study from ash evaporating to condensing[J]. Appl Therm Eng, 2015, 80: 150-159.

GUANGYU L, CHANG'AN W, YU Y, XI J, YINHE L, DEFU C. Release and transformation of sodium during combustion of Zhundong coals[J]. J Energy Inst, 2015, in press.

俞海淼, 曹欣玉, 周俊虎, 岑可法. 高碱灰渣烧结熔融过程中的物相变化[J]. 煤炭学报, 2007, 32(12): 1316-1319. (YU Hai-miao, CAO Xin-yu, ZHOU Jun-hu, CEN Ke-fa. Phase transformation of high alkaline ash residue on the process of sintering and fusion[J]. J China Coal Soc, 2007, 32(12): 1316-1319.)

陶玉洁, 张彦威, 周俊虎, 景雪晖, 李涛, 刘建忠, 岑可法. 准东煤在燃烧过程中的矿物演变过程及 Na, Ca 释放规律[J]. 中国电机工程学报, 2015, 35(5): 1169-1175. (TAO Yu-jie, ZHANG Yan-wei, ZHOU Jun-hu, JING Xue-hui, LI Tao, LIU Jian-zhong, CEN Ke-fa. Mineral conversion regularity and release behavior of Na, Ca during Zhundong coal's combustion[J]. Proc CSEE, 2015, 35(5): 1169-1175.)

马岩, 黄镇宇, 唐慧儒, 王智化, 周俊虎, 岑可法. 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 Zhen-yu, TANG Hui-ru, WANG Zhi-hua, ZHOU Jun-hu, CEN Ke-fa. Mineral conversion of Zhundong coal during ashing process and the effect of mineral additives on its ash fusion characteristics[J]. J Fuel Chem Technol, 2014, 42(1): 20-25.)

韩克鑫, 黄镇宇, 王智化, 周俊虎. 准东煤灰渣烧结熔融过程中钠基化合物作用机理研究[J]. 燃料化学学报, 2015, 43(1): 22-26. (HAN Ke-xin, HUANG Zhen-yu, WANG Zhi-hua, ZHOU Jun-hu. Action mechanism of sodium compounds in Zhundong coal ash on the process of sintering and fusion[J]. J Fuel Chem Technol, 2015, 43(1): 22-26.)

付子文, 王长安, 车得福, 翁青松. 成灰温度对准东煤灰理化特性影响的实验研究[J]. 工程热物理学报, 2014, 35(3): 609-613. (FU Zi-wen, WANG Chang-an, CHE De-fu, WENG Qing-song. Experimental study on the effect of ashing temperature on physicochemical properties of Zhundong coal ashes[J]. J Eng Thermophys, 2014, 35(3): 609-613.)

ZHOU B, ZHOU H, WANG J, CEN K. Effect of temperature on the sintering behavior of Zhundong coal ash in oxy-fuel combustion atmosphere[J]. Fuel, 2015, 150: 526-537.

黄镇宇, 李燕, 赵京, 周志军, 周俊虎, 岑可法. 不同灰成分的低熔点煤灰熔融性调控机理研究[J]. 燃料化学学报, 2012, 40(9): 1038-1043. (HUANG Zhen-yu, LI Yan, ZHAO Jing, ZHOU Zhi-jun, ZHOU Jun-hu, CEN Ke-fa. Ash fusion regulation mechanism of coal with low melting point and different ash compositions[J]. J Fuel Chem Technol, 2012, 40(9): 1038-1043.)

范建勇. 准东煤结渣特性及其配煤灰熔融性试验研究[D]. 杭州: 浙江大学, 2014. (FAN Jian-yong. Research on Zhundong coal's slagging characteristic and its ash fusibility of blending coal[D]. Hangzhou: Zhejiang University, 2014.)

李帆, 邱建荣, 郑楚光. 煤中矿物质对灰熔融温度影响的三元相图分析[J]. 华中理工大学学报, 1996, 24(10): 96-99. (LI Fan, QIU Jian-rong, ZHENG Chu-guang. The effect of mineral matter in coal on the ash melting point with ternary phase diagram[J]. J Huazhong Uni Sci Technol, 1996, 24(10): 96-99.)

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