Alkali metal migration law during co-gasification of pine sawdust and lignite

LI Shaohua; LIN Jianqing; CHE Deyong; JIANG Wenqiang

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Alkali metal migration law during co-gasification of pine sawdust and lignite

Thermal Power Generation Vol. 45, Issue 6, Pages: 51-56(2016)

更新时间：2025-09-28

- Alkali metal migration law during co-gasification of pine sawdust and lignite
- 作者机构：
  
  东北电力大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK6
- Published：2016
- 稿件说明：
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LI Shaohua, LIN Jianqing, CHE Deyong, et al. Alkali metal migration law during co-gasification of pine sawdust and lignite[J]. Thermal Power Generation, 2016, 45(6): 51-56.
DOI：

LI Shaohua, LIN Jianqing, CHE Deyong, et al. Alkali metal migration law during co-gasification of pine sawdust and lignite[J]. Thermal Power Generation, 2016, 45(6): 51-56. DOI：

摘要

采用热重分析仪和原子吸收光谱仪对松木屑与褐煤的共气化过程中碱金属K和Na元素的迁移特性进行了分析。结果表明:在松木屑与褐煤共气化过程中

焦炭气化阶段的反应活性较单独气化时有明显提高

即该阶段松木屑与褐煤产生协同作用;在松木屑和褐煤单独气化及共气化过程中

碱金属K元素和Na元素的析出量均随着气化温度的升高而增加;松木屑中碱金属含量高且较活泼

易于向气相中释放

共气化过程抑制了碱金属K元素和Na元素向气相中的释放

且抑制作用随气化温度的增加有增大的趋势。

Abstract

Thermogravimetric analysis on co-gasification characteristics of pine sawdust and lignite was carried out.The migration behavior of alkali metal elements Na and K during the co-gasification were investigated by using atomic absorption spectrometry.The results show that

the pine sawdust can improve the reactivity of coke gasification stage.In other words

the mixed sample produced a synergistic effect at that stage.As the gasification temperature increases

the alkali metal release during coke gasification stage increases steadily.The alkali metal content of raw materials was high and more active

and in the gasification process it was easy to release to the gas phase.The co-gasification process can inhibit the release of alkali metal to the gas phase.The inhibition tends to increase with the increasing gasification temperature.

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