Slagging and Fouling Characteristics of Zhundong High-Sodium Low-Rank Coal during Circulating Fluidized Bed Utilization

被引：28
作者：
Qi, Xiaobin [1 ,2 ]
Song, Guoliang [1 ,2 ]
Song, Weijian [1 ,2 ]
Yang, Shaobo [1 ,2 ]
Yang, Zhao [1 ,2 ]
Lyu, Qinggang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
ENERGY & FUELS | 2017年 / 31卷 / 12期
基金：
对外科技合作项目（国际科技项目）;
关键词：
VICTORIAN BROWN-COAL; PILOT-SCALE COMBUSTION; HIGH-ALKALI COAL; PULVERIZED COAL; ASH DEPOSITION; GASIFICATION; PYROLYSIS; LIGNITE; TRANSFORMATION; AGGLOMERATION;
D O I：
10.1021/acs.energyfuels.7b02053
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Zhundong coal (ZDc) with a large reserve is faced with severe slagging and fouling during combustion in pulverized coal furnaces because of its high Na content. Due to the low-temperature reaction characteristics of a circulating fluidized bed (CFB), the ash-related problems might be alleviated when ZDc is used as fuel in a CFB. In this study, the slagging and fouling characteristics of three types of ZDc were tested in a 0.4 t/d CFB test system. The influences of three aspects including reaction temperature, reaction atmosphere, and coal property were studied in order to realize the utilization of ZDc in the CFB. Experimental results indicate that slagging and fouling still occurred in the CFB. During gasification, ZDc displayed slagging behaviors in the riser, which was closely related to the used bed material of quartz sand. The slagging degree was increased with the rise of reaction temperature. In different reaction atmospheres, the migration and transformation behaviors of Na differed, which further contributed to the slagging in the riser during gasification and fouling on tail heating surfaces during combustion, respectively. Besides, the Na content and occurrence mode in ZDc greatly impacted slagging. For the used three kinds of ZDc, their slagging tendencies obeyed the order of ZDc-3 > ZDc-1 > ZDc-2.
引用
收藏
页码：13239 / 13247
页数：9
相关论文
共 51 条
  • [1] Biomass combustion with in situ CO2 capture by CaO in a 300 kWth circulating fluidized bed facility
    Alonso, M.
    Diego, M. E.
    Perez, C.
    Chamberlain, J. R.
    Abanades, J. C.
    [J]. INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 2014, 29 : 142 - 152
  • [2] A MECHANISTIC DESCRIPTION OF ASH DEPOSITION DURING PULVERIZED COAL COMBUSTION - PREDICTIONS COMPARED WITH OBSERVATIONS
    BAXTER, LL
    DESOLLAR, RW
    [J]. FUEL, 1993, 72 (10) : 1411 - 1418
  • [3] COMPARISON OF INORGANIC CONSTITUENTS IN 3 LOW-RANK COALS
    BENSON, SA
    HOLM, PL
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY PRODUCT RESEARCH AND DEVELOPMENT, 1985, 24 (01): : 145 - 149
  • [4] In-situ observation of the combustion of air-dried and wet Victorian brown coal
    Binner, Eleanor
    Zhang, Lian
    Li, Chun-Zhu
    Bhattacharya, Sankar
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2011, 33 : 1739 - 1746
  • [5] Inhibition of lignite ash slagging and fouling upon the use of a silica-based additive in an industrial pulverised coal-fired boiler. Part 1. Changes on the properties of ash deposits along the furnace
    Dai, Bai-Qian
    Wu, Xiaojiang
    De Girolamo, Anthony
    Zhang, Lian
    [J]. FUEL, 2015, 139 : 720 - 732
  • [6] Characteristics of Ash Deposits in a Pulverized Lignite Coal-Fired Boiler and the Mass Flow of Major Ash-Forming Inorganic Elements
    Dai, Bai-Qian
    Low, Fiona
    De Girolamo, Anthony
    Wu, Xiaojiang
    Zhang, Lian
    [J]. ENERGY & FUELS, 2013, 27 (10) : 6198 - 6211
  • [7] DUAN LB, 2015, J FUEL, V150, P8, DOI DOI 10.1016/J.FUEL.2015.01.110
  • [8] Study on the preheating stage of low rank coals liquefaction: Product distribution, chemical structural change of coal and hydrogen transfer
    Hao, Pan
    Bai, Zong-Qing
    Zhao, Zhi-Tong
    Yan, Jing-Chong
    Li, Xiao
    Guo, Zhen-Xing
    Xu, Jun-Li
    Bai, Jin
    Li, Wen
    [J]. FUEL PROCESSING TECHNOLOGY, 2017, 159 : 153 - 159
  • [9] Huang LL, 1995, COAL SCI TECHNOL, V24, P1243, DOI 10.1016/S0167-9449(06)80027-3
  • [10] Pyrolysis of a Victorian brown coal and gasification of nascent char in CO2 atmosphere in a wire-mesh reactor
    Jamil, K
    Hayashi, JI
    Li, CZ
    [J]. FUEL, 2004, 83 (7-8) : 833 - 843
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