王猛,张志勇
WANG Meng,ZHANG Zhiyong

• 1:内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司

摘要(Abstract)：

基于介观尺度（多孔介质尺度）研究循环流化床锅炉炉内石灰石脱硫机理，引入格子Boltzmann方法建立石灰石煅烧反应和硫化反应的反应动力学模型，采用C++语言开发了石灰石脱硫反应计算程序，并利用该程序研究了煅烧反应和硫化反应特性。结果表明，随着煅烧反应的进行，CaCO_3逐渐被消耗，并生成多孔的CaO；提高温度可促进煅烧反应的进行，提高环境CO_2质量浓度会抑制煅烧反应。对于硫化反应，生成的CaSO_4会覆盖在CaO表面并使孔隙变小进而逐渐堵塞，导致部分CaO未反应完全，提高SO_2质量浓度可促进硫化反应的进行，而O_2质量浓度的影响与此相反，且SO_2质量浓度的影响更大。
This paper carried out theoretical research on desulfurization mechanism of limestone in CFBB, first introduced lattice Boltzmann method and established reaction kinetics model of limestone calcination reaction and sulfation reaction based on mesoscopic scale(porous medium scale), and then developed calculation program of limestone desulfurization reaction using C ++ language. The characteristics of calcination reaction and sulfation reaction are studied by using this program. The results show that, for the calcination reaction, CaCO_3 is gradually consumed and porous CaO is formed with the progress of the reaction. Increasing the temperature can promote the calcination reaction, and increasing the ambient CO_2 concentration can inhibit the calcination reaction. For the sulfation reaction, the generated CaSO_4 will cover the surface of CaO and make the pores smaller and gradually blocked, resulting in partial CaO incomplete reaction. Increasing the concentration of SO_2 can promote the sulfation reaction, while the effect of O_2 concentration is contrary, and the effect of SO_2 concentration is greater.

关键词(KeyWords)： 石灰石;煅烧;硫化;格子Boltzmann方法
limestone;calcination;sulfation;lattice Boltzmann method

Abstract:

Keywords:

基金项目(Foundation): 内蒙古自治区自然科学基金项目“基于格子Boltzmann方法的石灰石脱硫反应机理研究”（2019BS05023）

作者(Author): 王猛,张志勇
WANG Meng,ZHANG Zhiyong

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