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[1] Wang Chunbo, Liu Hongcai, Chen Liang,. Model of limestone calcination/sulfationunder oxy-fuel fluidized bed combustion [J]. Journal of Southeast University (English Edition), 2015, 31 (2): 238-243. [doi:10.3969/j.issn.1003-7985.2015.02.014]
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Model of limestone calcination/sulfationunder oxy-fuel fluidized bed combustion()
富氧燃烧循环流化床中石灰石煅烧/硫化反应模型
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
31
Issue:
2015 2
Page:
238-243
Research Field:
Energy and Power Engineering
Publishing date:
2015-06-20

Info

Title:
Model of limestone calcination/sulfationunder oxy-fuel fluidized bed combustion
富氧燃烧循环流化床中石灰石煅烧/硫化反应模型
Author(s):
Wang Chunbo, Liu Hongcai, Chen Liang
School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
王春波, 刘洪才, 陈亮
华北电力大学能源动力与机械工程学院, 保定071003
Keywords:
oxy-fuel;  limestone;  simultaneous calcination/sulfation;  grain-micrograin model
富氧燃烧;  石灰石;  同时煅烧/硫化;  晶粒-微晶粒模型
PACS:
TK16
DOI:
10.3969/j.issn.1003-7985.2015.02.014
Abstract:
The characteristics of the simultaneous calcination/sulfation of limestone under oxy-fuel fluidized bed combustion were studied and compared with those of the sulfation of precalcined CaO. During the calcination stage, SO2 can react with product CaO and slow down the CaCO3 decomposition rate by the covering effect of the CaSO4 product. The sulfation rate of simultaneous calcination/sulfation is slower than that of precalcined CaO, but with a long enough sulfation time, the calcium conversion of simultaneous calcination/sulfation is higher than that of the precalcined CaO. A grain-micrograin model is established to describe the simultaneous calcination, sintering and sulfation of limestone. The grain-micrograin model can reflect the true reaction process of the calcination and sulfation of limestone in oxy-fuel fluidized bed combustion.
对富氧燃烧流化床下石灰石同时煅烧/硫化特性进行了研究, 并与CaO硫化特性进行了比较.在石灰石煅烧阶段, CaO与SO2反应生成CaSO4产物层覆盖在未煅烧CaCO3的外层, 降低了煅烧速率.同时煅烧/硫化过程中的硫化反应速率比CaO的硫化反应速率要缓慢, 但是经过足够长的反应时间后, 同时煅烧/硫化反应的钙转化率比CaO硫化反应的钙转化率要高.建立了一个包含石灰石同时煅烧、烧结和硫化反应的晶粒-微晶粒模型用于描述流化床内同时进行的石灰石煅烧、烧结和硫化过程, 实验证明所建立的模型能够反映流化床富氧气氛中石灰石的真实煅烧/硫化过程.

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Memo

Memo:
Biography: Wang Chunbo(1973—), male, doctor, professor, hdwchb@126.com.
Foundation items: The National Natural Science Foundation of China(No.51276064), the Natural Science Foundation of Hebei Province(No.E2013502292).
Citation: Wang Chunbo, Liu Hongcai, Chen Liang. Model of limestone calcination/sulfation under oxy-fuel fluidized bed combustion[J].Journal of Southeast University(English Edition), 2015, 31(2):238-243.[doi:10.3969/j.issn.1003-7985.2015.02.014]
Last Update: 2015-06-20